From Dan Froomkin:
George W. Bush's casual acknowledgment Wednesday that he had Khalid Sheikh Mohammed waterboarded -- and would do it again -- has horrified some former military and intelligence officials who argue that the former president doesn't seem to understand the gravity of what he is admitting.
Waterboarding, a form of controlled drowning, is "unequivocably torture", said retired Brigadier General David R. Irvine, a former strategic intelligence officer who taught prisoner of war interrogation and military law for 18 years.
"As a nation, we have historically prosecuted it as such, going back to the time of the Spanish-American War," Irvine said. "Moreover, it cannot be demonstrated that any use of waterboarding by U.S. personnel in recent years has saved a single American life."
More at the Huffington Post.