In late 2007, there was the first crack of daylight into the government's use of waterboarding during interrogations of Al Qaeda detainees. On Dec. 10, John Kiriakou, a former C.I.A. officer who had participated in the capture of the suspected terrorist Abu Zubaydah in Pakistan in 2002, appeared on ABC News to say that while he considered waterboarding a form of torture, the technique worked and yielded results very quickly.