I doubt everyone on this board has the same definition of torture.....
Is causing discomfort torture? Is scaring someone torture? Does it have to cause permanent physical or mental damage? How do you define mental damage?
Now if waterboarding is torture - Bill Clinton and both Bushes would have to be brought up on charges (40,000 military service personnel have been waterboarded, n reporters, and 3 terrorists or "illegal combatants"). Now of course Bill Clinton did not authorize the use of waterboarding on "terrorists", but he did authorize something much worse - rendition (no control over methods used).
Personally, I would not make it part of the "regular manual" on interrogation, but contrary to what I believed - it wasn't if it was only used on three (that would make it more of the exception). I do believe that if extra-ordinary means must be used, the President himself has to authorize each case (which is what Obama basically has committed to).
Contrary to the dogma these days, torture does work.... it just does not work in isolation (you must have some intelligence to match it to - otherwise you won't know if they just are saying anything).