My opinion on the subject is that he wasn't directly in charge of it. He very well may have mentioned the idea of it at some point but not in a "Hey let's do this.." sort of way. While I have no doubt that he is very happy about the attacks, I dont think he did them. My main reason for this is that the American government really just needs a scapegoat in a situation like this...someone who they can at least pretend they are seeking their bombs on to make the American public feel a bit safer. They blamed the Oklahoma City Bombing on Bin Laden too until they found out that it was actually an American who executed that act of terrorism. Plus, less than 2 hours after the 2nd trade tower fell, the media was blaming it on Bin Laden...which is before any investigations began. Not to mention the fact that America refused to give any evidence to Afghanistan of Bin Laden's guilt when asking them to hand him over to us.