There are other ways to get information. There are many other stories like this from interrogators, but I find this one the most poignant.
Read more: After Waterboarding: How to Make Terrorists Talk? - TIMEAbu Jandal's guards were so intimidated by him, they wore masks to hide their identities and begged visitors not to refer to them by name in his presence. He had no intention of cooperating with the Americans; at their first meetings, he refused even to look at them and ranted about the evils of the West. Far from confirming al-Qaeda's involvement in 9/11, he insisted the attacks had been orchestrated by Israel's Mossad. While Abu Jandal was venting his spleen, Soufan noticed that he didn't touch any of the cookies that had been served with tea: "He was a diabetic and couldn't eat anything with sugar in it." At their next meeting, the Americans brought him some sugar-free cookies, a gesture that took the edge off Abu Jandal's angry demeanor. "We had showed him respect, and we had done this nice thing for him," Soufan recalls. "So he started talking to us instead of giving us lectures."
It took more questioning, and some interrogators' sleight of hand, before the Yemeni gave up a wealth of information about al-Qaeda — including the identities of seven of the 9/11 bombers — but the cookies were the turning point. "After that, he could no longer think of us as evil Americans," Soufan says. "Now he was thinking of us as human beings."
Lest anyone start laughing that I propose to give all terrorists cookies, that isn't the point, that was the bait this terrorist took. Smart interrogators know how to find a weakness and exploit it. Sugar free cookies was this guy's, so the joke was on him.