He's "not clear" on whether the Khmer Rouge technique, waterboarding, is prohibited:
See web-only content:
http://www.theatlantic.com/daily-dish/archive/2007/07/gonzales-on-torture/226492/
This article available online at:
http://www.theatlantic.com/daily-dish/archive/2007/07/gonzales-on-torture/226492/
