Some argued it would save the U.S. after 9/11. Instead, the CIA's enhanced interrogation program came to be defined as American torture. The Forever Prisoner, a primary source for the recent HBO Max film directed by Academy Award winner Alex Gibney, exposes the full story behind the most divisive CIA operation in living memory.

Six months after 9/11, the CIA captured Abu Zubaydah and announced he was number three in Al Qaeda. Frantic to thwart a much-feared second wave of attacks, the U.S. rendered him to a secret black site in Thailand, where he collided with retired Air Force psychologist James Mitchell. Arguing that Abu Zubaydah had been trained to resist interrogation and was withholding vital clues, the CIA authorized Mitchell and others to use brutal "enhanced interrogation techniques" that would have violated U.S. and international laws had not government lawyers rewritten the rulebook.

In The Forever Prisoner, Cathy Scott-Clark and...