But to understand the question "Does torture work?" one must also define "work." If we include all the long-term negative consequences of torture, that answer becomes very clear. Those consequences include the fact that torture handed al Qaeda its No. 1 recruiting tool, a fact confirmed by the U.S. Department of Defense's interrogators in Iraq who questioned foreign fighters about why they had come there to fight. (I have first-hand knowledge of this information because I oversaw many of these interrogations and was briefed on the aggregate results.) In addition, future detainees will be unwilling to cooperate from the onset of an interrogation because they view all Americans as torturers. I heard this repeatedly in Iraq, where some detainees accused us of being the same as the guards at Abu Ghraib.
The more you think about, the less sense torture makes. U.S. allies will become unwilling to conduct joint operations if they are concerned about how detainees will be treated in U.S. custody (an argument made by the 9/11 Commission, among others). And future enemies will use our actions as justification to torture American captives. Torture also lowers our ethical standards to those of our enemies, an ugly shift that spreads like a virus throughout the Armed Services; witness the abuses of Abu Ghraib or the recent murders of civilians in Afghanistan.
Most importantly, we should be talking about the morality of torture, not its efficacy. When the U.S. infantry becomes bogged down in a tough battle, they don't turn to chemical weapons even though they are extremely effective. The reason they don't is because such weapons are illegal and immoral.
During the Revolutionary War, one top general made the point that torture was inconsistent with the fundamental beliefs of our founding fathers. "Should any American soldier be so base and infamous as to insure any [prisoner] ... I do most earnestly enjoin you to bring him to such severe and exemplary punishment as the enormity of the crime may require," he wrote to his troops in the Northern Expeditionary Force in the first year of the war. The general in question was George Washington. There's a reason we pledge to believe in "liberty and justice for all" and not "liberty and security for all": It's because we place our values and principles higher than we place our security. When we cease to do so, we forfeit our right to be called Americans.
We cannot become our enemy in trying to defeat him. American interrogators safely guided us through World War II without the use of torture, fighting an enemy and interrogating prisoners every bit as brutal and dedicated as the members of al Qaeda. Our interrogators continue to prove time and time again that they are smart enough to outwit al Qaeda's best and brightest. No one should ever doubt that we have the mental and ethical fortitude to win this war -- and to do it without lowering ourselves to the level of our foes.