I was all set to do a post on the report from the 9/11 commission, but I'm not sure it would do any good. All I would do is encourage you all to go and read it for yourselves*. Make up your own minds.
(although I reserve the right to bitch about this later.)
*It's a .pdf file, so it takes a while to load, and you have to have Adobe reader installed. (You probably do already.)