Full opinion text
MARCUS, Circuit Judge: Roy M. Belfast, Jr., a/k/a Charles McArthur Emmanuel, a/k/a Charles Taylor, Jr., a/k/a Chuckie Taylor, II (“Emmanuel”), appeals his convictions and 97-year sentence for committing numerous acts of torture and other atrocities in Liberia between 1999 and 2003, during the presidency of his father, Charles Taylor. Emmanuel, who is the first individual to be prosecuted under the Torture Act, 18 U.S.C. § 2340-2340A (“the Torture Act”), seeks reversal of his convictions on the ground that the Torture Act is unconstitutional. Primarily, Emmanuel contends that congressional authority to pass the Torture Act derives solely from the United States’s obligations as a signatory to the Convention Against Torture and Other Cruel, Inhuman or Degrading Treatment or Punishment, Dec. 10, 1984, 1465 U.N.T.S. 85 (the “CAT”); he says the Torture Act impermissibly exceeds the bounds of that authority, both in its definition of torture and its proscription against conspiracies to commit torture. Emmanuel also challenges his convictions under 18 U.S.C. § 924(c), which criminalizes the use or possession of a firearm in connection with a crime of violence. He says, among other things, that this provision cannot apply extraterritorially to his actions in Liberia. Finally, he claims that an accumulation of procedural errors made his trial fundamentally unfair, and that the district court erred in sentencing him. After thorough review, we conclude that all of Emmanuel’s convictions are constitutional. The United States validly adopted the CAT pursuant to the President’s Article II treaty-making authority, and it was well within Congress’s power under the Necessary and Proper Clause to criminalize both torture, as defined by the Torture Act, and conspiracy to commit torture. Furthermore, we hold that both the Torture Act and the firearm statute apply to extraterritorial conduct, and that their application in this case was proper. Finally, we conclude that Emmanuel’s trial and the resulting convictions were not rendered fundamentally unfair by any evidentiary or other procedural errors, and that his sentence is without error. Accordingly, we affirm Emmanuel’s convictions and sentence in all respects. I. The facts of this case are riddled with extraordinary cruelty and evil. The defendant, Charles McArthur Emmanuel, was born in Massachusetts in 1977, the son of Bernice Yolanda Emmanuel and Charles Taylor. Taylor returned to his native Liberia sometime thereafter. Emmanuel’s mother married Roy Belfast in 1983. Apparently out of fear that Taylor would try to take her son, Bernice Emmanuel moved with him and Belfast to Orlando, FL. There, the couple also changed Emmanuel’s name to Roy Belfast, Jr. In 1992, Emmanuel visited Liberia, where a bloody civil war had been raging for three years. At the time of Emmanuel’s visit, his father, Taylor, led the National Patriotic Front of Liberia (“NPFL”), an armed insurgent group. The NPFL was one faction in the struggle for national power following the assassination of Liberian President Samuel Doe in 1990. After some months, Emmanuel returned to the United States. Two years later, however, Emmanuel again visited Liberia; this time, he did not return. In 1997, Taylor was elected to the presidency. President Taylor soon charged the twenty-year-old Emmanuel with overseeing the state’s creation of an Anti-Terrorism Unit (“ATU”) — also known in Liberia as the “Demon Forces”' — which was responsible for protecting Taylor and his family. Under Emmanuel’s direction, the ATU began recruiting men to fill its ranks, and installed them at a former training camp known as Gbatala Base. The base was situated in a swampy area. As described by one recruit, Wesley Sieh, Emmanuel directed the ATU soldiers to dig around twenty grave-size prison pits, which were eventually covered with metal bars or barbed wire. A periodically overflowing river in the vicinity caused some of the pits to fill with water, which then stagnated. Aside from the prison pits, the base included a shooting range, a building containing a holding cell for disobedient ATU soldiers, and an “educational” training facility known as the College of Knowledge. The base was under the command of David Compari; he took orders from Emmanuel, who appeared several times a week wearing the ATU’s green tiger-striped uniform and red emblem bearing a cobra and scorpion. The ATU was Emmanuel’s self-described “pet project.” At Gbatala and elsewhere, ATU affiliates referred to Emmanuel as “Chief,” and his license plate read “Demon.” Between 1999 and 2002, the defendant wielded his power in a terrifying and violent manner, torturing numerous individuals in his custody who were never charged with any crime or given any legal process. The following is an account of those acts, as described at length and in disturbing detail at Emmanuel’s trial by his victims and others. A. 1999 Torture of Sierra Leonean Refugees (Counts Three and Four) In the late 1990s, Sierra Leoneans fled civil war in their country and crossed into Liberia, where they registered with the United Nations as refugees. Among them were Sulaiman Jusu and Momoh Turay, who had resettled in the northern Liberian town of Voinjama in 1998. On April 21, 1999, armed forces attacked Voinjama. Along with other refugees, Turay and Jusu fled towards Monrovia, Liberia, aboard trucks operated by the World Food Program. Yet, as is recounted in their extensive trial testimony, Turay and Jusu never reached Monrovia. Their difficulties began when the refugee trucks were stopped at the St. Paul River Bridge Checkpoint, only about 150 kilometers by road to the southeast of Voinjama, and in the northern vicinity of the town of Gbarnga. ATU soldiers ordered the Sierra Leonean refugee passengers off the trucks and segregated them by gender. Turay and Jusu were in a group that also included Albert Williams, Foday Conteh, and Abdul Cole. ATU soldiers stripped Turay to his underwear, and then searched and interrogated all of the men. Meanwhile, the refugee truck on which Turay, Jusu, and the others had been traveling left the checkpoint without them. Soon thereafter, the defendant Emmanuel arrived at the checkpoint, shouting and holding a pistol. He confronted the refugees and asked them if they were the rebels who had attacked Voinjama. When none of the detained refugees answered, Emmanuel killed three of them, including Williams, in front of the others; Emmanuel made the three men kneel before him and then shot each of them in the head while telling the other male refugees that they would be next. On Emmanuel’s orders, soldiers dragged the bodies away; Jusu and Turay later saw two of the victims’ severed heads displayed atop posts at the checkpoint. The refugees, including Jusu, Turay, Conteh, and Cole, were then placed in a small cell at the checkpoint. When they were taken out, ATU soldiers beat them with their guns, bound them “tabie style” — their elbows tied so tightly behind their backs as to be touching — and blindfolded them. The refugees were then transferred by van to the Gbarnga Police Station while still bound and only in their underwear. The ATU soldiers continued to beat them during the journey, and Tu-ray was beaten so badly that he defecated on himself. Within two days, Jusu, Turay, Conteh, and Cole were taken to Gbatala Base, about thirty-five kilometers to the southwest of Gbarnga. At Gbatala, Emmanuel ordered ATU soldiers to put the four men into the prison pits. The pits were approximately two- and-a-half feet deep, covered with metal bars and barbed wire, lined with cement, and partially filled with water. Jusu’s pit contained a rotting corpse and chin-high water; Turay’s pit was filled with water and bones and was so small that it forced him to squat while his hands were tied to the bars covering the hole. ATU soldiers standing guard continually abused the prisoners, stabbing Jusu and Turay with guns, forcing Jusu to eat burning hot cassava stems that had been roasting in a fire, stepping on Turay’s hands, which were tied above his head, and dripping molten plastic onto Turay’s naked body. Turay testified that Emmanuel told the commander of Gbatala Base to “take care of’ the prisoners if they did not tell the truth about their involvement with the Kamajors, a militia working in Sierra Leone to fight Taylor’s regime. On their second night in the Gbatala prison pits, Jusu and Cole escaped but were recaptured. ATU soldiers brought them back to the base after beating them with their guns. Emmanuel burned Turay with a cigarette, beat Jusu and Cole, and ultimately ordered that all the prisoners be taken from the pits. Once assembled, Emmanuel told the prisoners that no one escapes from Gbatala, and ordered his soldiers to kill Cole. When an ATU soldier reached for his gun, Emmanuel stopped him, and ordered that Cole be decapitated instead; with a bucket in place to collect the blood, the soldier then slowly sawed Cole’s head off with a three-foot knife while Cole cried, screamed, and begged for his life. Emmanuel ordered that the prisoners be taken back to the pits, admonishing them that if anyone else attempted to escape, Cole’s punishment would be theirs as well. After still more beatings, Jusu and Tu-ray were placed in a pit and tied together, by one hand each, to the pit cover. Guards beat them the next day and melted plastic onto their bodies. That night, Jusu and Turay escaped again after being told by another prisoner, whose toes had been cut off, that the ATU planned to kill all of the Sierra Leoneans. But Jusu and Turay were recaptured, and for their attempted escape, they were severely beaten and abused. ATU soldiers burned both men with dripping candles, and the defendant Emmanuel dripped molten plastic all over Jusu’s body, including onto his genitals. Emmanuel also stabbed both mens’ legs— and Turay’s head — with a bayonet. The abuse escalated still further when President Taylor sent a message that he wanted to see the prisoners who had escaped. At Taylor’s request, Jusu and Turay, along with Conteh, were “tabie” bound and driven to the president’s private compound in Monrovia, known as Whiteflower. Once there, Emmanuel and Gbatala Base commander Compari brought the three prisoners to Taylor and his defense minister, Daniel Chea. Taylor asked the prisoners if they were the rebels who had attacked Voinjama, warning them that if they did not talk, their heads would be cut off and buried in the sand. Chea observed that the men should have been killed at Gbatala Base, but suggested that they could at least be forced to provide information. He proposed that they be interrogated at Barclay Training Center (“Barclay”), a facility in Monrovia used by Liberia’s national army. The defendant Emmanuel and the ATU soldiers then brought Jusu, Turay, and Conteh to Barclay, where they were imprisoned. They could barely walk or even move their hands because their faces and bodies were so severely swollen from the repeated violence they had endured. The stench from their untreated wounds was so strong that the other prisoners in their cell demanded that the guards remove them. In these conditions, Jusu, Turay, and Conteh were held against their will, without ever being charged with any crime, or allowed to see a lawyer, from late April 1999 until May 20, 1999. The three men were released only when the United Nations High Commissioner intervened. Upon their release, Jusu, Turay, and Conteh received medical treatment both at a Monrovia clinic and at a United Nations refugee camp. They were resettled with their families in March 2000 in Sweden. B. 1999 Torture of Rufus Kpadeh (Count Five) The Liberian town of Voinjama was again attacked in August 1999, and, again, residents, including farmer and furniture-maker Rufus Kpadeh, fled the city. At trial, Kpadeh testified in detail about his flight from Voinjama and, ultimately, his terrifying ordeal at the hands of Emmanuel and the ATU. From Voinjama, Kpadeh fled with his family, first on foot and then on a truck operated by a non-governmental organization. Armed ATU soldiers stopped the truck at the St. Paul River Bridge Checkpoint and ordered the male passengers to step down. ATU soldiers detained Kpadeh after they searched his bag and found an identification card from the Unity Party, a non-violent political party opposing the Taylor regime. Emmanuel, who was dressed in an ATU uniform and had a pistol at his side, interrogated Kpadeh, asking him if he was a rebel. Kpadeh said he was not. Emmanuel then asked Kpadeh if he would fight for him. Kpadeh said he would not because he did not believe in war. On Emmanuel’s orders, ATU soldiers stripped Kpadeh naked, tied his legs, bound his arms tabie-style, blindfolded him, and took him by truck to Gbatala Base. Once at Gbatala Base, Emmanuel ordered that Kpadeh be placed in something known as the “Vietnam Prison,” and ordered Compari, the base commander, to torture Kpadeh until he told the truth. Before putting Kpadeh in the prison, Compari plunged him, still bound, into a creek four times, holding his head underwater. At Emmanuel’s express instruction, Compari then cut the underside of Kpadeh’s genitals with a knife. At the “Vietnam Prison,” Kpadeh was put in a five-foot-deep pit covered with metal bars and containing chest-high water in which, still naked, he was forced to squat. Kpadeh shared his pit with other prisoners, all of whom were forced to urinate in the stagnant water. By the time Kpadeh’s elbows were untied, his arms and hands were numb. Kpadeh never received medical attention for the wounds on his genitals, which continued to bleed for two weeks. Kpadeh was kept naked in the pits at Gbatala Base and was repeatedly abused for approximately two months. He was removed from the pits only to be tortured or to defecate. The abuse was worse on the days Emmanuel visited the base. Once, Emmanuel ordered Kpadeh to “run the rim” for 45 minutes, meaning that Kpadeh was forced to run in a large circle with a heavy, six-foot log on one shoulder, while ATU soldiers would strike the log with a metal rod, causing extreme pain to shoot through Kpadeh’s body. On another occasion, Emmanuel ordered Kpadeh, along with other Gbatala Base prisoners, to play soccer with a large stone and no shoes, causing their feet to bleed and bruise. Emmanuel watched and laughed. On still another occasion, Emmanuel forced Kpadeh to sodomize another prisoner and also to be sodomized, again while Emmanuel watched and laughed. ATU soldiers would also beat Kpadeh, burn him with melted plastic, jab him with the iron used to clean the barrel of a gun, and shovel stinging ants onto his body. He and the other prisoners were forced to eat cigarette butts and drink their own urine. During his nearly two months of captivity, Kpadeh, like Turay, Jusu, and Conteh, was never charged with a crime, brought before a judge, or allowed any legal representation. In October 1999, Kpadeh was released from Gbatala Base; his release coincided with media reports about Gbatala Base and pressure from human rights groups. Just prior to his release, the ATU gave him soap to bathe, had his hair cut, and provided him with clothing, all while instructing him not to tell the human rights organizations about Gbatala Base. He received medical treatment at a Monrovia hospital for three months. Kpadeh currently resides in Liberia and lives with residual scars, pain, and limited functioning of one hand as a result of his time at Gbatala Base. C. 2002 Torture of Varmyan Dulleh (Count Six) The jury also heard extensively from torture victim Varmyan Dulleh. Dulleh was a student at the University of Monrovia and had joined the Student Unification Party, an organization advocating social justice and peace. He was also a member of the Mandingo ethnic group, which was known to have opposed President Taylor during the civil war. In addition, Dulleh’s uncle was the former leader of a group that had sought to overthrow the prior Liberian president, and who had run against Taylor in a subsequent election. On July 24, 2002, armed gunmen, including ATU soldiers, arrested Dulleh at his home on the charge that he sought to overthrow President Taylor. After Dulleh was interrogated, the Liberian Police Director took him to Whiteflower. At White-flower, Dulleh denied any involvement in attempting to overthrow Taylor’s government. President Taylor ordered that Dulleh be placed in the custody of General Benjamin Yeaten, the head of Liberia’s Special Security Service. Yeaten was instructed to beat Dulleh until he told the truth. When Dulleh again denied knowing anything, Yeaten took him to his garage, ordered soldiers to put a dirty rag in his mouth, and burned him with a heated clothes iron on his arm, back, stomach, and foot. The defendant Emmanuel arrived while the abuse was in progress, and watched as Dulleh was branded. After Dulleh again denied any involvement in rebel activities, Yeaten poured scalding water onto his head and back, and into his hands. Emmanuel pointed a gun at Dulleh’s head and told him not to drop any of the scalding water in his hands. Emmanuel also shocked Dulleh’s neck, back, and genitals with a cattle prod. Both Emmanuel and Yeaten then threatened to kill Dulleh, and soldiers poured salt into his wounds. After this savage beating, Dulleh was confined for almost a year, mostly in filthy conditions. At first, he was imprisoned with other individuals in a shallow cement hole beneath a disused truck scale at Klay Junction. The steel grate on the underside of the scale shut out the light, and the hole, which was at most three feet deep, was partially flooded with filthy water, contained animals such as toads and snakes, and emitted a vile stench. While imprisoned at Klay Junction, Dulleh told the other prisoners that he had been tortured and beaten by Emmanuel; they observed the burns and fresh wounds on his body. About two weeks later, Dulleh was removed from the hole at Klay Junction and flown by helicopter to an undisclosed location, where he was confined for a month in an abandoned outhouse. Finally, he was held at the National Bureau of Investigation in Monrovia for ten months. Dulleh was released on July 11, 2003, in response to international pressure from the United States ambassador, the Catholic Church, and human rights groups. Despite the fact that Liberian courts were open and operating, Dulleh was never charged with any crime, brought before a court, or allowed to see an attorney. He fled Liberia within a week of his release, and was granted asylum in the United States in 2005. D. 2002 Torture of Mulbah Kamara (Count Seven) Mulbah Kamara, a Liberian of Mandingo ethnicity and another one of Emmanuel’s victims, also testified at trial. Kamara ran several Monrovia businesses, including a computer school, an Internet café, and a communications center. In September 2002, his home and one of his businesses were ransacked and burglarized. He reported the incidents to the police. As he was leaving the police station, however, he was arrested, stripped to his underwear, and thrown into a truck. Armed men drove Kamara to a beach, where he saw people lying on the ground, some of them dead. He was then brought to Whiteflower, where President Taylor repeatedly asked him if he knew why he was there. Kamara answered that he did not. Taylor then ordered General Yeaten to take Kamara away, and armed men drove him to Yeaten’s house. Once there, Kamara was stripped naked and made to lie face down in the garage, where he was guarded by a group of ten- to twelve-year-old boys armed with automatic weapons. On the general’s orders, the boys put a hot, bright spotlight close to Kamara’s face and told him not to close or move his eyes; Kamara was forced to stay in that position for hours and was beaten if he blinked. The light, which caused Kamara great pain, was shone continually in his face over a three-day confinement at the general’s home. Later, Yeaten again asked Kamara why he was there; when Kamara again responded that he did not know, Yeaten ordered him to bend over, inserted an electrical prod into his anus, and shocked him. The electrical shock traveled all over Kamara’s body, including, by his account, through his brain, and made him feel like he was going to die. Yeaten also shocked Kamara’s penis with the electrical prod, and then kicked and beat him with the butt of a gun. Later, after declaring which parts of Kamara’s body they were going to eat, the child soldiers further beat Kamara, who by that time was incapable of the slightest resistance as a result of the unremitting abuse. The next day, the defendant Emmanuel arrived at Yeaten’s home with bodyguards and armed, uniformed men. Emmanuel asked Kamara if he was ready to talk; Kamara replied that he did not know what to say. Emmanuel then told his entourage to “take care of’ Kamara. The soldiers kicked him to the ground and beat his stomach and groin while Emmanuel watched and laughed. After Emmanuel left, Yeaten used a hot clothes iron to scorch Kamara’s stomach, knee, and genitals, burning his skin off. After his three-day confinement at Yeaten’s house, Kamara was taken to Klay Junction, where he was kept for thirteen days in an underground hole filled with dirty water. After being transferred to another location in Liberia, Kamara was imprisoned at the National Bureau of Investigation. There, he saw Dulleh, whom he recognized from his past employment working with European Union imports at the Port of Monrovia. Kamara was released from prison in late December 2002, but was ordered to report to President Taylor’s executive mansion every day. He was never charged with a crime or brought before a court. His former superior, a European Union official, helped Kamara and his family flee Liberia. In February 2003, Kamara was admitted to the United States, where he still lives and suffers from lingering medical issues, including vision problems and disfigured genitals. E. Emmanuel’s Conduct After the Fall of the Taylor Regime In 2003, Liberia’s civil war ended. President Taylor resigned, left the country, and was ultimately extradited to the Hague, where he is currently on trial for crimes against humanity in the Special Court for Sierra Leone. Emmanuel left Liberia in July 2003. Between 2004 and 2005, he called the United States Defense Attaché in Liberia from Trinidad several times, seeking information about the United Nations travel ban on certain persons, inquiring about joining the United States Marines, and claiming that he was an American who could go home whenever he wanted. On March 30, 2006, when Emmanuel arrived at Miami International Airport on a flight from Trinidad, officials executed a warrant for his arrest for attempting to enter the United States using a false passport. Emmanuel’s luggage contained a book on guerilla tactics and a notebook with rap lyrics, some making reference to the ATU. During his arrest, Emmanuel knowingly waived his rights and made the following statements: first, that his father was Charles Taylor, even though he had listed “Daniel Smith” as his father on a recent U.S. passport application; second, that the ATU was his “pet project” prior to 2000 and that he was considered its commander; and third, that he was present when a “press guy” was arrested by “the general” — Yeaten—and was beaten and burned with an iron. In November 2007, a grand jury sitting in the United States District Court for the Southern District of Florida returned an eight-count superseding indictment against Emmanuel. Count One charged him with a conspiracy to commit torture in Liberia against seven unnamed victims — with death resulting to at least one victim — by seizing, imprisoning, interrogating, and mistreating them, and by committing various acts with the specific intent to inflict severe physical pain and suffering, all in violation of 18 U.S.C. § 2340A(c). Count Two charged Emmanuel with a conspiracy to use and carry a firearm during and in relation to a crime of violence, in violation of 18 U.S.C. § 924(o). Counts Three through Seven charged him with committing substantive crimes of torture against five named victims, in violation of 18 U.S.C. § 2340A(a). Count Eight charged Emmanuel with using and carrying a firearm during and in relation to a crime of violence, in violation of 18 U.S.C. § 924(c)(1)(A). Emmanuel moved to dismiss the indictment, claiming, among other things, that the Torture Act is unconstitutional. The district court denied that motion, concluding that the Torture Act was a proper exercise of Congress’s power “under the Necessary and Proper Clause of Article I, as an adjunct to the Executive’s authority under Article II to enter into treaties.” Order denying motion to dismiss indictment, at 10, United States v. Emmanuel, No. 06-20758 (S.D.Fla. July 5, 2007). The district court specifically rejected Emmanuel’s argument that the Torture Act was unconstitutional because its language did not precisely mirror the definition of torture contained in the CAT; the court explained that Congress needed “flexibility” in performing its “delegated responsibilities,” and concluded that the Torture Act “plainly bears a rational relationship” to the CAT. Id. at *9. The district court also determined that Congress had the power to apply the Torture Act extraterritorially, and had clearly expressed its intent to do so. Id. at *11-13. Finally, the district court concluded that 18 U.S.C. § 924(c) also applied to Emmanuel’s extraterritorial conduct because Emmanuel had committed a crime of violence that could be prosecuted in the United States, which is all the statute, on its face, requires. Id. at *12-14. After a one-month trial, the jury convicted Emmanuel on all seven counts of the superseding indictment. A presentence investigation report (“PSI”) was then prepared for Emmanuel under the 2002 Sentencing Guidelines manual. First, because Emmanuel had witnessed various acts of torture, had ordered others to commit torture, and had engaged in torturous acts that were part of a campaign to quell opposition to his father’s presidency, he was assessed a four-level aggravating role adjustment for being a leader pursuant to U.S.S.G. § 3Bl.l(a). Second, because Emmanuel was convicted of more than one offense, the PSI applied the multiple count aggregation rules contained in U.S.S.G. § 3D1.2. The PSI established an offense group for each of the ten victims relating to the conspiraey-to-commit-torture count (Count One), and, where applicable, grouped the substantive counts (Counts Three through Seven) with Count One under U.S.S.G. §§ IB 1.2(d) and 3D1.2(b). Specifically, the PSI identified seven victims that Emmanuel tortured (Jusu, Tu-ray, Conteh, Cole, Kpadeh, Dulleh, and Kamara) and three victims that he shot and killed (Williams and two unnamed individuals at the St. Paul River Bridge Checkpoint). Pursuant to U.S.S.G. § 3D1.2(c), the PSI treated the conspiracy conviction under the firearm statute (Count Two) as a specific offense characteristic, or adjustment, for the individual groups to which it pertained. Count Eight, the substantive offense of using and carrying a firearm during a crime of violence, in violation of 18 U.S.C. § 924(c), was not included in the grouping because it carries a mandatory consecutive sentence. The Sentencing Guidelines provide that multiple substantive guidelines may apply to convictions under the Torture Act. U.S.S.G. app. A. The PSI applied U.S.S.G. § 2A4.1, the provision relating to kidnapping, abduction, and other unlawful restraints, to the ten offense groups, yielding a base offense level of 24. Moreover, because Emmanuel killed three victims under circumstances constituting murder, the district court applied to those three offense groups § 2A4.1(c)(l)’s cross-reference to § 2A1.1, the guideline applicable to murder. This calculation yielded a base offense level of 43, which was then subjected to a four-level aggravating role increase under § 3Bl.l(a) and a multi-count adjustment under § 3D1.4. Emmanuel’s final combined, adjusted offense level was 51. Emmanuel objected to the PSI. In particular, he argued that the application of the § 2A4.1 kidnapping guideline and the § 2A1.1 murder cross-reference was unconstitutional and improper, because he had not been charged with or convicted of either kidnapping or murder, and because none of the murders resulted from the alleged torture. Emmanuel also argued that the district court could not constitutionally sentence him for anything other than torture, because the CAT did not specifically prohibit murder or kidnapping. Emmanuel suggested, instead, that the aggravated assault guideline, § 2A2.2, better represented his convicted conduct. Emmanuel also objected to the PSPs use of ten offense groups, arguing that Williams, Cole, and the two unnamed individuals did not merit their own offense groups because there was insufficient evidence at trial that Emmanuel had killed them. The district court concluded that the kidnapping guideline, U.S.S.G. § 2A4.1, was the most appropriate of the potentially applicable guidelines, because the offenses against all of the victims contained one or more elements of unlawful restraint, abduction, or kidnapping. The district court observed that, whether or not the victims’ initial detention was lawful, their continued detention plainly was not. Next, in addressing Emmanuel’s objection to the application of § 2A4.1’s cross-reference to § 2A1.1, the district court determined that this cross-reference did not require that the victim’s death have resulted from any torture. It found that the § 2A4.1 cross-reference applied because the evidence showed that more than one victim was killed in circumstances that constituted murder. Consequently, the district court found that the base offense level was 43, and that a four-level aggravating role enhancement applied pursuant to U.S.S.G. § 3Bl.l(a). Inasmuch as an offense level of 43 is the highest level contained in the sentencing guidelines, and corresponds to life imprisonment, the district court ultimately set Emmanuel’s offense level at 43. After hearing from the parties regarding the 18 U.S.C. § 3553(a) factors, the court imposed a total sentence of 1,164 months, or 97 years, of imprisonment. The total term consisted of 240 months each for Counts One and Two, 120 months each for Counts Three through Seven, and 84 months for Count Eight, all running consecutively. The district court entered judgment on January 1, 2009, and Emmanuel timely appealed. II. Congress passed the Torture Act to implement the United States’s obligations under the Convention Against Torture, which itself was the product of a long-evolving international consensus against torture committed by official actors. The CAT was adopted by the United Nations General Assembly on December 10, 1984. The preamble to the CAT recognizes the obligation of nations, under the U.N. Charter, to “promote universal respect for, and observance of, human rights and fundamental freedoms.” See CAT, pmbl. The preamble thus announced the treaty’s broad purpose of “mak[ing] more effective the struggle against torture and other cruel, inhuman or degrading treatment or punishment throughout the world.” Id. President Reagan signed the Convention Against Torture on April 18, 1988, and approximately one month later, the CAT was transmitted to the Senate for its advice and consent, along with seventeen reservations, understandings, and declarations. See Convention Against Torture and Other Cruel, Inhuman or Degrading Treatment or Punishment, S. Exec. Rep. 101-30, at 7 (1990). In January 1990, President George H.W. Bush submitted a revised list of such conditions. See id. at 7-11. Of particular relevance here, the United States expressed its understanding that “in order to constitute torture, an act must be specifically intended to inflict severe physical or mental pain or suffering.” See id. at 9, 36. The Senate adopted a resolution of advice and consent to ratification of the CAT on October 27, 1990, subject to several conditions, including the one just mentioned. President Clinton deposited the instrument of ratification, which included the Senate reservations, understandings, and declarations, with the United Nations on October 21, 1994. The CAT became the law of the land on November 20, 1994, thirty days after it was deposited for ratification with the United Nations. At present, 146 nations are signatories to the CAT. The CAT defines “torture” this way: [A]ny act by which severe pain or suffering, whether physical or mental, is intentionally inflicted on a person for such purposes as obtaining from him or a third person information or a confession, punishing him for an act he or a third person has committed or is suspected of having committed, or intimidating or coercing him or a third person, or for any reason based on discrimination of any kind, when such pain or suffering is inflicted by or at the instigation of or with the consent or acquiescence of a public official or other person acting in an official capacity. CAT, art. 1(1). The CAT excludes from its purview “pain or suffering arising only from, inherent in or incident to lawful sanctions.” Id. Article 2(1) of the CAT requires each signatory nation to “take effective legislative, administrative, judicial or other measures to prevent acts of torture in any territory under its jurisdiction.” Specifically, each signatory is obliged to “ensure that all acts of torture are offences under its criminal law,” and must also criminalize “any attempt to commit torture and ... an act by any person which constitutes complicity or participation in torture.” CAT, art. 4(1). Article 5(l)-(2) requires each signatory nation to “take such measures as may be necessary to establish its jurisdiction over the offences [described] ... [w]hen the alleged offender is a national of that State” and “where the alleged offender is present in any territory under its jurisdiction and it does not extradite him.” Because the resolution of advice and consent from the Senate specified that the CAT was not self-executing, Congress passed the Torture Act, 18 U.S.C. §§ 2340-2340A, on April 30, 1994, pursuant to Articles 4 and 5 of the CAT. The Torture Act provides that “[w]hoever outside the United States commits or attempts to commit torture shall be fined ... or imprisoned not more than 20 years, or both, and if death results ... shall be punished by death or imprisoned for any term of years or for life.” 18 U.S.C. § 2340A(a). The federal courts have jurisdiction if “the alleged offender is a national of the United States[,] or [if] the alleged offender is present in the United States, irrespective of the nationality of the victim or alleged offender.” Id. § 2340A(b). A person who conspires to commit an offense under the Torture Act is subject to the same penalties prescribed for the offense itself. Id. § 2340A(c). The Torture Act defines torture as an act committed by a person acting under the color of law specifically intended to inflict severe physical or mental pain or suffering (other than pain or suffering incidental to lawful sanctions) upon another person within his custody or physical control. Id. § 2340(1). “Severe mental pain or suffering,” in turn, is defined as the prolonged mental harm caused by or resulting from— (A) the intentional infliction or threatened infliction of severe physical pain or suffering; (B) the administration or application, or threatened administration or application, of mind-altering substances or other procedures calculated to disrupt profoundly the senses or personality; (C) the threat of imminent death; or (D) the threat that another person will imminently be subjected to death, severe physical pain or suffering, or the administration or application of mind-altering substances or other procedures calculated to disrupt profoundly the senses or personality.... Id. § 2340(2). III. Emmanuel claims that the Torture Act exceeds Congress’s powers under the Constitution in several respects. We review such constitutional challenges to legislation de novo. United States v. Ferreira, 275 F.3d 1020, 1024 (11th Cir.2001). A. The heart of Emmanuel’s argument is that the Torture Act is invalid because its definition of torture sweeps more broadly than that provided by the CAT. According to Emmanuel, there are three crucial differences between the definition of torture in the CAT and the Torture Act: first, the CAT requires that “torture” be committed for some proscribed purpose— specifically, “for such purposes as” obtaining information, punishing, intimidating, or coercing a person, or for “any reason based on discrimination of any kind,” CAT, art. 1(1) — whereas the Torture Act does not require the government to prove the defendant’s motive; second, the CAT requires that the torturer’s actions actually result in “severe pain and suffering,” whereas the Torture Act requires only an act committed with the “specific[ ] in-tension] to inflict severe physical or mental pain or suffering”; and third, the CAT limits the scope of “torture” to conduct committed by “a public official or other person acting in an official capacity,” whereas the Torture Act requires that the torturous conduct be “committed by a person acting under the color of law.” Because Emmanuel challenges the statute on its face, the hurdle he must clear is an exceedingly high one. See United States v. Salerno, 481 U.S. 739, 745, 107 S.Ct. 2095, 95 L.Ed.2d 697 (1987). Article II gives the President the “Power, by and with the Advice and Consent of the Senate, to make Treaties, provided two thirds of the Senators present concur.” U.S. Const, art. II, § 2, cl. 2. In determining whether Congress has the authority to enact legislation implementing such a treaty, we look to the Necessary and Proper Clause. Ferreira, 275 F.3d at 1027. That clause confers on Congress the “Power ... [t]o make all Laws which shall be necessary and proper for carrying into Execution the foregoing Powers, and all other Powers vested by this Constitution in the Government of the United States.” U.S. Const. art. I, § 8, cl. 18. Collectively, these clauses empower Congress to enact any law that is necessary and proper to effectuate a treaty made pursuant to Article II. In recognition of the expansive language of the Necessary and Proper Clause, the Supreme Court has made clear that the clause “grants Congress broad authority to enact federal legislation.” United States v. Comstock, — U.S. -, 130 S.Ct. 1949, 1956, 176 L.Ed.2d 878 (2010) (quoting McCulloch v. Maryland, 17 U.S. (4 Wheat.) 316, 413-14, 4 L.Ed. 579 (1819)); see also Katzenbach v. Morgan, 384 U.S. 641, 650, 86 S.Ct. 1717, 16 L.Ed.2d 828 (1966). Thus, the Court has explained, “the word ‘necessary’ does not mean ‘absolutely necessary.’ ” Comstock, 130 S.Ct. at 1956. Rather, “the Necessary and Proper Clause makes clear that the Constitution’s grants of specific federal legislative authority are accompanied by broad power to enact laws that are ‘convenient, or useful’ or ‘conducive’ to the authority’s ‘beneficial exercise.’ ” Id. (citation omitted). As Chief Justice Marshall wrote in McCulloch v. Maryland, “[l]et the end be legitimate, let it be within the scope of the constitution, and all means which are appropriate, which are plainly adapted to that end, which are not prohibited, but consist with the letter and spirit of the constitution, are constitutional.” 17 U.S. (4 Wheat) at 421. Thus, “in determining whether the Necessary and Proper Clause grants Congress the legislative authority to enact a particular federal statute, we look to see whether the statute constitutes a means that is rationally related to the implementation of a constitutionally enumerated power.” Comstock, 130 S.Ct. at 1956 (emphasis added); see also Gonzales v. Raich, 545 U.S. 1, 22, 125 S.Ct. 2195, 162 L.Ed.2d 1 (2005) (upholding statute enacted pursuant to Commerce Clause because “Congress had a rational basis” for concluding that statute implemented congressional power under the Commerce Clause); Sabri v. United States, 541 U.S. 600, 605, 124 S.Ct. 1941, 158 L.Ed.2d 891 (2004) (noting that review under the Necessary and Proper Clause is for “means-ends rationality”). In United States v. Lue, for example, the Second Circuit applied this rational relationship test in upholding the constitutionality of the Hostage Taking Act, which was enacted to implement the Hostage Taking Convention. 134 F.3d 79 (2d Cir.1998). The court observed that the “plainly adapted” standard [from McCulloch] requires that the effectuating legislation bear a rational relationship to a permissible constitutional end. Were this not the case, any congressional enactment not passed pursuant to an expressly enumerated power would be subject to challenge on some more rigorous means-end analysis. Such thoroughgoing judicial involvement in the day-to-day enactments of Congress would undercut the foundation on which M’Culloch rests: the need to preserve a realm of flexibility in which Congress can carry out its delegated responsibilities. Id. at 84 (emphasis added). We, too, have recognized that the rational relationship test is an appropriate way to determine whether a federal enactment is authorized by the Necessary and Proper Clause in connection with an enumerated power. Ferreira, 275 F.3d at 1027-28 (adopting the reasoning and holding of Lue in a similar constitutional challenge to the Hostage Taking Act). Congressional power to pass those laws that are necessary and proper to effectuate the enumerated powers of the Constitution is nowhere broader and more important than in the realm of foreign relations. Correspondingly, the judiciary’s role in reviewing the acts of Congress in this area must be appropriately circumscribed. As the D.C. Circuit has explained, a determination by the political branches concerning the obligations of the United States is also a determination about the conduct of American foreign policy. Defining and enforcing the United States’ obligations under international law require the making of extremely sensitive policy decisions, decisions which will inevitably color our relationships with other nations. Such decisions are “delicate, complex, and involve large elements of prophecy. They are and should be undertaken only by those directly responsible to the people whose welfare they advance or imperil. They are decisions of a kind for which the Judiciary has neither aptitude, facilities nor responsibility. ...” Finzer v. Barry, 798 F.2d 1450, 1458-59 (D.C.Cir.1986) (quoting Chicago & S. Air Lines, Inc. v. Waterman Steamship Corp., 333 U.S. 103, 111, 68 S.Ct. 431, 92 L.Ed. 568 (1948)), aff'd in part and rev’d in part sub nom. Boos v. Barry, 485 U.S. 312, 108 S.Ct. 1157, 99 L.Ed.2d 333 (1988). Indeed, there is a particularly strong ease for deference to the political branches, over and above the traditional and general requirement of restraint in the area of foreign relations, [when a court is] asked to review a statute which both Congress and ... [a] President ] have declared to be necessary to fulfill our obligations under both customary international law and a treaty which we have signed. Id. at 1459. It follows generally that “[i]f [a] treaty is valid there can be no dispute about the validity of [a] statute [passed] under Article I, Section 8, as a necessary and proper means to execute the powers of the Government.” Missouri v. Holland, 252 U.S. 416, 432, 40 S.Ct. 382, 64 L.Ed. 641 (1920); see also Lue, 134 F.3d at 84 (“If the Hostage Taking Convention is a valid exercise of the Executive’s treaty power, there is little room to dispute that the legislation passed to effectuate the treaty is valid under the Necessary and Proper Clause.”). Thus, while our task in interpreting a treaty is ordinarily to give it a “meaning consistent with the shared expectations of the contracting parties,” Air France v. Saks, 470 U.S. 392, 399, 105 S.Ct. 1338, 84 L.Ed.2d 289 (1985), our role is narrowed considerably “where the President and the Senate [have] expressed] a shared consensus on the meaning of [the] treaty as part of the ratification process,” Auguste v. Ridge, 395 F.3d 123, 143 (3d Cir.2005). In such a case, that “shared consensus ... is to govern in the domestic context.” Id. Notably, the existence of slight variances between a treaty and its congressional implementing legislation do not make the enactment unconstitutional; identicality is not required. Rather, as the Second Circuit held in Lue, and as we echoed in Ferreira, legislation implementing a treaty bears a “rational relationship” to that treaty where the legislation “tracks the language of the [treaty] in all material respects.” Lue, 134 F.3d at 84 (emphasis added); see also Ferreira, 275 F.3d at 1027-28. In Lue, for example, the claim was that the Hostage Taking Act strayed too far from the bounds of the Hostage Taking Convention in defining a “hostage taker.” The Hostage Taking Convention defined a hostage taker this way: Any person who seizes or detains and threatens to kill, to injure or to continue to detain another person ... in order to compel a third party, namely, a State, an international intergovernmental organization, a natural or juridical person, or a group of persons, to do or abstain from doing any act as an explicit or implicit condition for the release of the hostage[, is a hostage taker]. Lue, 134 F.3d at 82 (emphasis added) (quoting Hostage Taking Convention, art. 1). The Hostage Taking Act defined a hostage taker in a slightly different manner, providing, among other things, an arguably broader definition of “third party”: [W]hoever, whether inside or outside the United States, seizes or detains and threatens to kill, to injure, or to continue to detain another person in order to compel a third person or a governmental organization to do or abstain from doing any act as an explicit or implicit condition for the release of the person detained, or attempts or conspires to do so[, is a hostage taker]. Id. at 81-82 (quoting 18 U.S.C. § 1203(a)). Yet, these differences in language and scope between the treaty and its implementing legislation did not mean that one lacked a rational relationship to the other. Instead, because the differences in language were not material, the Second Circuit found a rational relationship between the Hostage Taking Convention and the Hostage Taking Act. Id. at 84. Applying the rational relationship test in this case, we are satisfied that the Torture Act is a valid exercise of congressional power under the Necessary and Proper Clause, because the Torture Act tracks the provisions of the CAT in all material respects. The plain language of the CAT controls the analysis of its scope, Sale v. Haitian Ctrs. Council, Inc., 509 U.S. 155, 194, 113 S.Ct. 2549, 125 L.Ed.2d 128 (1993), and the CAT declares broadly that its provisions are “without prejudice to any international instrument or national legislation which does or may contain provisions of wider application,” CAT, art. 1(2). Put simply, the CAT created a floor, not a ceiling, for its signatories in their efforts to combat torture. Moreover, settled rules of treaty interpretation require that we construe the CAT generously: In choosing between conflicting interpretations of a treaty obligation, a narrow and restricted construction is to be avoided as not consonant with the principles deemed controlling in the interpretation of international agreements. Considerations which should govern the diplomatic relations between nations, and the good faith of treaties, as well, require that their obligations should be liberally construed so as to effect the apparent intention of the parties to secure equality and reciprocity between them. For that reason if a treaty fairly admits of two constructions, one restricting the rights which may be claimed under it, and the other enlarging it, the more liberal construction is to be preferred. Factor v. Laubenheimer, 290 U.S. 276, 298-94, 54 S.Ct. 191, 78 L.Ed. 315 (1933). Turning, then, to the Torture Act, we examine each of the three variances that Emmanuel identifies between its provisions and those of the CAT. First, Emmanuel points out that the CAT and the Torture Act differ in that Article 1(1) of the CAT requires that torture be intentionally inflicted on another person for such purposes as obtaining from him or a third person information or a confession, punishing him for an act he or a third person has committed or is suspected of having committed, or intimidating or coercing him or a third person, or for any reason based on discrimination of any kind, whereas the Torture Act does not require the government to prove the defendant’s motive. This difference, however, is simply not material. The list provided in the CAT, which is prefaced by the phrase “for such purposes as,” is not integral to the definition of torture. Rather, as courts have recognized in the context of other federal statutes that adopt the CAT’s definition of torture, the CAT independently requires that torture be committed “intentionally,” CAT, art. 1(1), and the “for such purposes” language serves only to “reinforce” that requirement — i.e., “that torture requires acts both intentional and malicious.” Price v. Socialist People’s Libyan Arab Jamahiriya, 294 F.3d 82, 93 (D.C.Cir.2002) (emphasis added) (internal citations omitted) (discussing similar “for such purposes as” language in the Torture Victim Protection Act and Foreign Sovereign Immunities Act). The “for such purposes” language is meant merely “to illustrate the common motivations that cause individuals to engage in torture ... [and to] ensure[ ] that, whatever its specific goal, torture can occur ... only when the production of pain is purposive, not merely haphazard.” Id. Furthermore, the congressional definition of torture contained in the Torture Act fully embodies the considerations that the CAT’s “for such purposes” language is intended to “reinforce.” Congress properly understood the thrust of this language to require intentionality on the part of the torturer: The requirement of intent is emphasized in Article 1 by reference to illustrate motives for torture: obtaining information of a confession, intimidations and coercion, or any reason based on discrimination of any kind. The purposes given are not exhaustive, as is indicated by the phrasing “for such purposes as.” Rather, they indicate the type of motivation that typically underlies torture, and emphasize the requirement for deliberate intention or malice. S. Exec. Rep. 101-30, at 14. The Torture Act in no way eliminates or obfuscates the intent requirement contained in the offense of torture; instead, the Act makes that requirement even clearer by stating that the proscribed acts must have been “specifically intended” to result in torture. 18 U.S.C. § 2340(1). Congress simply did not exceed its power to implement the CAT, pursuant to the Necessary and Proper Clause, by omitting a provision that merely “reinforces” the core definition of torture as an intentional and malicious act. Again, the Necessary and Proper Clause gives Congress “broad power to enact laws that are ‘convenient, or useful’ or ‘conducive’ to the ... ‘beneficial exercise’ ” of an enumerated power. Comstock, 130 S.Ct. at 1956 (citation omitted). The means chosen by Congress to criminalize torture in the Torture Act “are appropriate, [and] are plainly adapted to that end,” McCulloch, 17 U.S. (4 Wheat) at 421; they faithfully implement the purpose of the CAT to outlaw, broadly, the cruel, inhuman, and degrading infliction of pain and suffering by official actors. The means by which Congress implemented the CAT therefore fully “consist with the letter and spirit of the constitution, [and] are constitutional.” Id. Second, Emmanuel claims that the Torture Act oversteps the bounds of the CAT by criminalizing not only consummated acts of torture, but acts done with no more than the “specific[] intention] to inflict” severe pain or suffering, whether or not such pain or suffering is actually inflicted. Emmanuel correctly characterizes the proscriptions of the Torture Act, see 18 U.S.C. § 2340(1) (“ ‘[T]orture’ means an act ... specifically intended to inflict severe physical or mental pain or suffering .... ”), but he fails to persuade us that they are unconstitutional. The CAT expressly directs state parties to punish unconsummated crimes of torture. Specifically, it requires that state parties criminalize not only torture, but also attempts to commit torture. CAT, art. 4(1) (“Each State Party shall ensure that all acts of torture are offences under its criminal law. The same shall apply to an attempt to commit torture.... ”). In simple terms, an attempt to commit torture is exactly the same as an act done with the specific intent to commit torture. See United States v. Yost, 479 F.3d 815, 819 (11th Cir.2007) (explaining that the crime of attempt consists of some overt act, e.g., a substantial step, done with the requisite specific intent). There is accordingly no merit to this second claim concerning the definition of torture. Third, we reject Emmanuel’s claim that the Torture Act is invalid because its official-conduct requirement uses the phrase “under the color of law,” rather than the phrase “in an official capacity,” as found in the CAT. The Senate Executive Committee charged with evaluating the CAT aptly explained that there is no distinction between the meaning of the phrases “under the color of law” and in “an official capacity”: The scope of the Convention is limited to torture “inflicted by or at the instigation or with the consent or acquiescence of a public official or other person acting in an official capacity.” Thus, the Convention applies only to torture that occurs in the context of governmental authority, excluding torture that occurs as a wholly private act or, in terms more familiar in U.S. law, it applies to torture inflicted “under color of law.” S. Exec. Rep. 101-30, at 14. Similarly, in the context of 42 U.S.C. § 1983, the Supreme Court has explained that “[t]he traditional definition of acting under color of state law requires that the defendant ... have exercised power ‘possessed by virtue of state law and made possible only because the wrongdoer is clothed with the authority of state law.’ ” West v. Atkins, 487 U.S. 42, 49, 108 S.Ct. 2250, 101 L.Ed.2d 40 (1988) (quoting United States v. Classic, 313 U.S. 299, 326, 61 S.Ct. 1031, 85 L.Ed. 1368 (1941)); see also Kadic v. Karadzic, 70 F.3d 232, 245 (2d Cir.1995) (looking to the § 1983 color-of-law jurisprudence for guidance on whether a defendant engaged in official action under the Alien Tort Statute). There is no material difference between this notion of official conduct and that imparted by the phrase “in an official capacity.” In sum, we can discern no merit to any of Emmanuel’s constitutional challenges to the way in which Congress defined torture in the Torture Act. If anything, the arguably more expansive definition of torture adopted by the United States is that much more faithful to the CAT’s purpose of enhancing global efforts to combat torture. B. Emmanuel also claims that the Torture Act is unconstitutional because it applies during armed conflicts, but that claim is easily rejected. The CAT itself says that “[n]o exceptional circumstances whatsoever, whether a state of war or a threat of war, internal political instability or any other public emergency, may be invoked as a justification of torture.” CAT, art. 2(2). Referring to that provision, the Senate Executive Report explained that [t]he use of torture in wartime is already prohibited within the scope of the Geneva Conventions, to which the United States and virtually all other countries are Parties, and which in any event generally reflect customary international law. The exclusion of public emergency as an excuse for torture is necessary if the Convention is to have significant effect, as public emergencies are commonly invoked as a source of extraordinary powers or as a justification for limiting fundamental rights and freedoms. S. Exec. Rep. 101-30, at 15; see also Nuru v. Gonzales, 404 F.3d 1207, 1222 (9th Cir.2005) (“Even in war, torture is not authorized.”). Accordingly, there is no merit to Emmanuel’s contention that the CAT, or legislation authorized by the CAT, cannot apply during armed conflicts. C. Emmanuel also fails to persuade us that he cannot be prosecuted for torture committed before Liberia became a signatory to the Convention Against Torture in 2004. Nothing in the CAT limits its application to torture committed within the territorial borders of its signatories. Indeed, such a limitation would be at odds with the treaty’s core purpose of “mak[ing] more effective the struggle against torture ... throughout the world,” CAT, pmbl., inasmuch as any nation that wished to practice torture, even on a huge scale, could avoid all responsibility by not signing the CAT in the first place, or by withdrawing from the CAT before engaging in torture. To avoid precisely those possibilities, the CAT requires each state party to “ensure that all acts of torture are offences under its criminal law.” Id. art. 4(1). Congress faithfully implemented the CAT’s directive to prosecute torture wherever it may occur, applying the proscriptions of the Torture Act to “[w]hoever outside the United States commits ... torture.” 18 U.S.C. § 2340A(a) (emphasis added). Emmanuel, for his part, is bound by the Torture Act, a valid congressional enactment. The Supreme Court made clear long ago that an absent United States citizen is nonetheless “personally bound to take notice of the laws [of the United States] that are applicable to him and to obey them.” Blackmer v. United States, 284 U.S. 421, 438, 52 S.Ct. 252, 76 L.Ed. 375 (1932). Emmanuel was a United States citizen at all relevant times— when the Torture Act was passed and when he committed all of the acts for which he was convicted. As such, he is bound by United States law “made applicable to him in a foreign country.” Id. at 436, 52 S.Ct. 252. “For disobedience to its laws through conduct abroad, he was subject to punishment in the courts of the United States.” Id. Thus, there was nothing improper about application of the Torture Act to Emmanuel’s conduct in Liberia before that country signed the CAT. D. Next, Emmanuel argues that his convictions are invalid because the Torture Act allows federal courts to take jurisdiction over an act of torture based solely on the presence of the alleged torturer in the United States, something he claims is not authorized by the CAT or any other provision of law. Notably, there was no need to invoke this so-called “present-in” jurisdiction in this case because Emmanuel is a United States citizen. See 18 U.S.C. § 2340A(b)(1) (conferring jurisdiction over acts of torture where “the alleged offender is a national of the United States”). Thus, we address Emmanuel’s objection to “present-in” jurisdiction only in the context of his facial challenge to the Torture Act. Article 5(2) of the CAT obligates a signatory nation to assert jurisdiction over an “alleged offender” who is “present in any territory under its jurisdiction” and whom it does not extradite. It is difficult to see what clearer authorization of “present-in” jurisdiction the CAT might have contained. Consistent with the plain language of the CAT, Congress placed the following jurisdictional provision in the Torture Act: (b) Jurisdiction — There is jurisdiction over the activity prohibited in subsection (a) if— (1) the alleged offender is a national of the United States; or (2) the alleged offender is present in the United