It's now incontrovertible, and documented. Yep, not only did Bush know, but he explicitly authorized this treatment. In the loop. Every step of the way. See this Daily Kos story.
Impeachment's no longer sufficient. If Bush and his whole cabal aren't tried for war crimes, the concept of of a war crime no longer has meaning.
This was done with your money, in your name. By those troops, you know, the ones we support, by ordering them to do this kind of thing. Aren't you proud?