Read this from a guy who knows:

As a former Master Instructor and Chief of Training at the US Navy Survival, Evasion, Resistance and Escape School (SERE) in San Diego, California I know the waterboard personally and intimately. SERE staff were required undergo the waterboard at its fullest. I was no exception. I have personally led, witnessed and supervised waterboarding of hundreds of people. It has been reported that both the Army and Navy SERE school’s interrogation manuals were used to form the interrogation techniques used by the US army and the CIA for its terror suspects. What was not mentioned in most articles was that SERE was designed to show how an evil totalitarian, enemy would use torture at the slightest whim. If this is the case, then waterboarding is unquestionably being used as torture technique.

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