Obama changed his mind and now wants to block the release of classified photos that show detainees being abused. After seeing the photos, he became worried that releasing them would further endanger US troops. I take this to mean that the images could have propaganda value for al Qaeda.
Since I haven't seen the photos, I can only imagine how horrible the images must be. Can the images be worse than I can imagine? It might be better to release the photos than have everyone wonder what's in them. The secrecy can have just as much enemy propaganda value as the actual images. The best thing to do is to release the images, admit that the abuse was wrong, and say that it won't happen again.