How is the United States supposed to obtain information from people who are proven terrorists?

If the United States has in custody someone who is SURELY a terrorist because of being caught in terrorist activities, how should the US obtain information from them to save innocent lives? Give them a warm bubble bath and hold their hand, or use challenging interrogation techniques?How is the United States supposed to obtain information from people who are proven terrorists?That's a difficult one because aren't they kinda like going to die for the cause any way .what happened to truth serum or is that stuff only made up for t.v ...or get them really high on some thing.How is the United States supposed to obtain information from people who are proven terrorists?Both methods would probably work.How is the United States supposed to obtain information from people who are proven terrorists?ask them nicely are you a terrorist, one mans terrorist is another mans freedom fighterHow is the United States supposed to obtain information from people who are proven terrorists?
A gentleman proved his technique is most effective. He gains their trust and confidence. The statistics showed this worked better than aggressive techniques where the subjects almost always shut down.