As I have been given to understand it from various sources, waterboarding as practiced today doesn't actually introduce water into the body of the subject. Yes in the cases you cited water got into the stomach, mouth and even lungs, and it caused unconciousness. If ANY of that is happening in what they are doing today, then yes I am opposed to it. It is okay to cause fear in interrogations of terrorists, they fall outside of the conventions, but it still needs to be done carefully and only in rare cases of special need. But if they're getting water in the stomachs or lungs or even mouth then it's wrong.