WP:
Headed for court martials through the Uniform Code of Military Justice?The Supreme Court today delivered a stunning rebuke to the Bush administration over its plans to try Guantanamo detainees before military commissions, ruling that the commissions violate U.S. law and the Geneva Conventions governing the treatment of war prisoners.
In a 5-3 decision, the court said the trials were not authorized by any act of Congress and that their structure and procedures violate the Uniform Code of Military Justice (UCMJ) and the four Geneva Conventions signed in 1949. [...]
The ruling, which overturned a federal appeals court decision in which Roberts had participated, represented a defeat for President Bush, who had ordered trials before special military tribunals for detainees at the Guantanamo Bay naval base. About 450 detainees captured in the war on terrorism are currently held at the U.S. naval base in Cuba. Trying them before military commissions would place them under greater restrictions and afford them fewer rights than they would get in federal courts or regular military courts.
Bush said he would consult with Congress to seek "a way forward" after the ruling, which reversed the appeals court decision on statutory grounds, avoiding major constitutional issues.