The CIA tortured high-value Al Qaeda operative Abu Zubaida. When he broke, Zubaida revealed details of numerous terrorism plots and sent CIA officers chasing leads around the globe. In the end, not a single significant plot was foiled as a result of these confessions obtained under torture. Nearly all of the leads quickly evaporated, while most of the useful information from Abu Zubaida -- chiefly names of al-Qaeda members and associates -- was obtained before waterboarding was introduced.
