	Introduction

The renewal of military commission proceedings against Khalid Sheik Mohammad and four others for their alleged involvement in the 9/11 terrorist attacks has focused renewed attention on the differences between trials in federal court and those conducted by military commission. The decision to try the defendants in military court required a reversal in policy by the Obama Administration, which had publicly announced in November 2009 its plans to transfer the five detainees from the U.S. Naval Station in Guantanamo Bay, Cuba, into the United States to stand trial in the U.S. District Court for the Southern District of New York for criminal offenses related to the 9/11 attacks. The Administration's plans to try some Guantanamo detainees in federal civilian court proved controversial, and Congress responded by enacting funding restrictions which barred any non-citizen held at Guantanamo from being transferred into the United States for any purpose, including prosecution. These restrictions, which have been extended for the duration of FY2014, effectively make military commissions the only viable option for trying detainees held at Guantanamo for the foreseeable future, and have resulted in the Administration choosing to reintroduce charges against Mohammed and his co-defendants before a military commission. While military commission proceedings have been instituted against a number of suspected enemy belligerents held at Guantanamo, the Obama Administration has opted to bring charges in federal criminal court against many terrorist suspects held at locations other than Guantanamo. This report provides a brief summary of legal issues raised by the choice of forum for trying accused terrorists and a chart comparing authorities and composition of the federal courts to those of military commissions. A second chart compares selected military commissions rules under the Military Commissions Act (MCA), as amended by the Military Commissions Act of 2009, to the corresponding rules that apply in federal court. This chart follows the same order and format used in CRS Report RL31262, Selected Procedural Safeguards in Federal, Military, and International Courts , to facilitate comparison with safeguards provided in international criminal tribunals. For similar charts comparing military commissions as envisioned under the MCA, as passed in 2006, to the rules that had been established by the Department of Defense (DOD) for military commissions and to general military courts-martial conducted under the Uniform Code of Military Justice (UCMJ), see CRS Report RL33688, The Military Commissions Act of 2006: Analysis of Procedural Rules and Comparison with Previous DOD Rules and the Uniform Code of Military Justice , by [author name scrubbed]. Some have noted the prevalence of the charge of material support for terrorism in military commission cases to date and question the continued viability of the military commission system in light of this decision. The government did not appeal the decision to the Supreme Court. §175c) Participation in Nuclear and WMD Threats to the United States (18 U.S.C. §1993) Terrorist Acts Abroad Against United States Nationals (18 U.S.C.
The renewal of military commission proceedings against Khalid Sheik Mohammad and four others for their alleged involvement in the 9/11 terrorist attacks has focused renewed attention on the differences between trials in federal court and those conducted by military commission. The decision to try the defendants in military court required a reversal in policy by the Obama Administration, which had publicly announced in November 2009 its plans to transfer the five detainees from the U.S. Naval Station in Guantanamo Bay, Cuba, into the United States to stand trial in the U.S. District Court for the Southern District of New York for criminal offenses related to the 9/11 attacks. The Administration's plans to try these and possibly other Guantanamo detainees in federal court proved controversial, and Congress responded by enacting funding restrictions which effectively barred any non-citizen held at Guantanamo from being transferred into the United States. These restrictions, which have been extended for the duration of FY2014, effectively make military commissions the only viable option for trying detainees held at Guantanamo for the foreseeable future, and have resulted in the Administration choosing to reintroduce charges against Mohammed and his co-defendants before a military commission.
While military commission proceedings have been instituted against some suspected enemy belligerents held at Guantanamo, the Obama Administration has opted to bring charges in federal criminal court against terrorist suspects arrested in the United States, as well as some terrorist suspects who were taken into U.S. custody abroad but who were not transferred to Guantanamo. Some who oppose the use of federal criminal courts argue that bringing detainees to the United States for trial poses a security threat and risks disclosing classified information, or could result in the acquittal of persons who are guilty. Others have praised the efficacy and fairness of the federal court system and have argued that it is suitable for trying terrorist suspects and wartime detainees, and have also voiced confidence in the courts' ability to protect national security while achieving justice that will be perceived as such among U.S. allies abroad. Some continue to object to the trials of detainees by military commission, despite the amendments Congress enacted as part of the Military Commissions Act of 2009 (MCA), P.L. 111-84, because they say it demonstrates a less than full commitment to justice or that it casts doubt on the strength of the government's case against those detainees. Others question the continued viability of military commissions in light of the recent appellate court decision invalidating the offense of material support of terrorism as to conduct occurring prior to the 2006 enactment of the MCA (Hamdan v. United States).
This report provides a brief summary of legal issues raised by the choice of forum for trying accused terrorists and a chart comparing selected military commissions rules under the Military Commissions Act, as amended, to the corresponding rules that apply in federal court. The chart follows the same order and format used in CRS Report RL31262, Selected Procedural Safeguards in Federal, Military, and International Courts, to facilitate comparison with safeguards provided in international criminal tribunals. For similar charts comparing military commissions as envisioned under the MCA, as originally passed in 2006, to the rules that had been established by the Department of Defense (DOD) for military commissions and to general military courts-martial conducted under the Uniform Code of Military Justice (UCMJ), see CRS Report RL33688, The Military Commissions Act of 2006: Analysis of Procedural Rules and Comparison with Previous DOD Rules and the Uniform Code of Military Justice, by [author name scrubbed].