What's tragic about the renditions isn't so much that they are evil, as that they are utterly fucking pointless. They serve no purpose. They don't make the world safer, but they do erode the idea that there are rules that apply to everybody and which are not to be broken.
No excuse for torture, not ever, no matter the situation, no matter the number of lives it will supposedly save, its flat out wrong, 100% wrong in any and all circumstances.
Obamas first action should be the arrest of his predecessor and his henchmen, and if it turns out that they have presidential pardons that stop any legal action, then get the ICC charter ratified and hand the mob over to the Hague Any idiot can face a crisis - it's day to day living that wears you out.