Up until now, it’s been accepted that only the CIA waterboarded detainees at black sites in the “war on terror,” and only three prisoners at that. But a new investigation of available materials from Congress, Inspector General reports, first-hand and second-hand accounts in the press, as well as other documentary evidence, shows that use of waterboarding-style torture was likely used widely by U.S. forces, from Afghanistan to Iraq to Guantanamo.