Talk to someone who has actually interrogated people before. They will tell you that torture doesn't work. That simple. Any FBI agent or CIA officer interviewed says it doesn't work. I have seen torture before, and no, it doesn't work. One case, I arrested someone for reentering the US after being deported, and a police department contacted us saying the man I arrested was involved with a cop shooting. We let the department take him, and they ended up beating him for hours, and placing a bag over his head and stopping him from breathing at periodic intervals. Did he confess to shooting anyone? Nope. Did he give up whichever one of his friends shot the officer? Nope. He didn't. They ended up finding out who shot the officer through regular police work, which is how you get intelligence, not by beating it out of people. This was back in the 80s, but again, no matter what date it is, it doesn't change the fact that it doesn't work.
Oh, and don't forget what else torture does. Helps al-Qaeda recruit, puts our soldiers at risk from al-Qaeda, and it opens the door for other nations to torture our troops. Say we go to war with China 50 years from now. They will argue that they have the right to torture our captive troops because we did it and said it was OK back in the 2000s.