The al Qaeda mastermind, known as KSM, stubbornly held out for about two minutes -- far longer than any of the other "high-value" terror targets who were subjected to the technique, the harshest from a list of six techniques approved for use by the CIA and Bush administration lawyers, sources said.
Then KSM started talking, in idiomatic English he learned as a high school foreign exchange student and polished at a North Carolina college in the 1980s, sources said.
"It was an extraordinary amount of time for him to hold out," one former CIA officer told ABCNews.com. "A red-headed female supervisor was in the room when he was being water-boarded. It was humiliating to him. So he held out."
"Then he started talking, and he never stopped," this former officer said. KSM was never water-boarded again, and in hours and hours of conversation with his interrogators, often over a cup of tea, he poured out his soul and the murderous deeds he committed.