They didn't plan with Mohammad Atta, but they wanted the attacks to happen so they did NOTHING about it. Without that attack, they wouldn't have been able to invade.
See PNAC where it says, "we need another Pearl Harbor type incident in order to push our radical agenda".
And did they also have nothing to do with the Anthrax mailings? Or just purposely mislead us into believing that Saddam and Al Queda had something to do with those attacks. Even though people told them there was no connection, they told them to MAKE a connection.
No, I don't think he's as incompetent as you think. He may be, but the people pulling his strings aren't. Remember him in those classrooms? He totally is not the guy in charge. Where was Chaney? In his evil underground fortress, working on the dark side? LOL.
I don't have all the answers, but something is seriously fucked up about this administration. And these people say they like Bush more than the two candidates we have now? That is sooo scary. People are fucked up. Insane.