Watch this. You might also want to read Torture Team: Rumsfelds' Memo and the Betrayal of American Values by Philippe Sands.
It's wrong and it doesn't work. If it was wrong and it did work, I would still argue that we are better people than that, but that argument is moot. So shut up, Dick Cheney. You only made us much less safe (remember invading a NON-Al Qaeda -invested nation on trumped-up charges, making a new group of people hate us and kill our brave service men?).