A guard walks through a hallway in Camp Delta at the Guantanamo Bay Naval Station in Guantanamo Bay, Cuba September 4, 2007. The U.S. military is building a mobile courtroom complex on an unused runway at the Guantanamo Bay naval base and plans to be ready by March to conduct as many as three terrorism trials at a time. Picture taken September 4, 2007. REUTERS/Joe Skipper (CUBA)