I've always wondered, if 9/11 was a fake terrorist attack staged by the government to justify wars against Afghanistan and Iraq, why did they make it look like Saudi terrorists were behind it, instead of Afghani or Iraqi terrorists?

And why haven't they faked evidence of WMD's in Iraq? It sure would have helped them out a lot, and it would have been a hell of a lot simpler than getting a demolition crew to covertly plant bombs all over the Twin Towers, then faking some plane hijackings, and shooting a missile into the Pentagon that witnesses swear looked just like an airliner.