From WaPo:

Key senators say Congress has outlawed one of the most notorious detainee interrogation techniques — “waterboarding,” in which a prisoner feels near drowning. But the White House will not go that far, saying it would be wrong to tell terrorists which practices they might face.

Inside the CIA, waterboarding is cited as the technique that got Khalid Sheik Mohammed, the prime plotter of the Sept. 11, 2001, terrorist attacks, to begin to talk and provide information — though “not all of it reliable,” a former senior intelligence official said.

Waterboarding is variously characterized as a powerful tool and a symbol of excess in the nation’s fight against terrorists. But just what is waterboarding, and where does it fit in the arsenal of coercive interrogation techniques? mo’