Our pilots that were shot down over North Vietnam endured incredible torture. The North Vietnamese could break any of them and did. The code of the pilots was to resist up to the point they thought they would be killed. Some of our brave men resisted past that point and were tortured to death. They were able to break them and get information. They were not able to "turn them" against out great nation.
Torture applied correctly does work.
No doubt, to a certain extent. But, what the CIA and other US intelligence use isn't torture, ala the Vietnamese. It is non damaging coercion, and it works also. It is stupid to remove these techniques from use when the stakes are so high.