Detainees were deprived of sleep for as long as a week, and were sometimes told that they would be killed while in American custody. With the approval of the C.I.A.'s medical staff, some C.I.A. prisoners were subjected to medically unnecessary “rectal feeding” or “rectal hydration” — a technique that the C.I.A.'s chief of interrogations described as a way to exert “total control over the detainee.” C.I.A. medical staff members described the waterboarding of Khalid Shaikh Mohammed, the chief planner of the Sept. 11 attacks, as a “series of near drownings.
Source (NY Times). Full document (528 pages, 105MB).

Source (NY Times). Full document (528 pages, 105MB).