Image The Senate report describes the waterboarding of Khalid Shaikh Mohammed as a "series of near drownings." Credit... Associated Press

The Senate report quotes a series of August 2002 cables from a C.I.A. facility in Thailand, where the agency’s first prisoner was held. Within days of the Justice Department’s approval to begin waterboarding the prisoner, Abu Zubaydah, the sessions became so extreme that some C.I.A. officers were “to the point of tears and choking up,” and several said they would elect to be transferred out of the facility if the brutal interrogations continued.

Questions From Within

During one waterboarding session, Abu Zubaydah became “completely unresponsive with bubbles rising through his open, full mouth.” The interrogations lasted for weeks, and some C.I.A. officers began sending messages to the agency’s headquarters in Virginia questioning the utility — and the legality — of what they were doing. But such questions were rejected.

“Strongly urge that any speculative language as to the legality of given activities or, more precisely, judgment calls as to their legality vis-à-vis operational guidelines for this activity agreed upon and vetted at the most senior levels of the agency, be refrained from in written traffic (email or cable traffic),” wrote Jose A. Rodriguez Jr., then the head of the C.I.A.'s Counterterrorism Center.

Image Abu Zubaydah’s torture moved some C.I.A. officers to tears. Credit... U.S. Central Command, via Associated Press

“Such language is not helpful.”

The Senate report found that the detention and interrogation of Mr. Zubaydah and dozens of other prisoners were ineffective in giving the government “unique” intelligence information that the C.I.A. or other intelligence agencies could not get from other means.

The report also said that the C.I.A.'s leadership for years gave false information about the total number of prisoners held by the C.I.A., saying there had been 98 prisoners when C.I.A. records showed that 119 men had been held. In late 2008, according to one internal email, a C.I.A. official giving a briefing expressed concern about the discrepancy and was told by Mr. Hayden, then the agency’s director, “to keep the number at 98” and not to count any additional detainees.