The interrogation techniques used by U.S. personnel on detainees at the naval base at Guantanamo Bay, Cuba remain shrouded in mystery. While U.S. policy is that the detainees be treated “humanely,” the Department of Defense has never revealed publicly how the detainees have been interrogated. Nevertheless, internal administration documents that are now public shed light on interrogation techniques that were recommended and/or authorized by Department of Defense officials for use on the Guantanamo detainees.