Dick Cheney, the US vice-president, has defended the use of waterboarding on prisoners at Guantanamo Bay and said the prison should remain open until the "war of terror" ends.
In an interview with US broadcaster ABC News on Monday, Cheney admitted he was aware that waterboarding was used on Khalid Sheikh Mohammed, the alleged planner of the September 11, 2001 attacks on the US.
Waterboarding is used in interrogation to make a detainee feel as if he is drowning.
Asked whether he thought it was appropriate, Cheney replied: "I do."
Asked if he thought, in hindsight, any of the tactics went too far, Cheney said, "I don't."