9-11 Commission report cleared Saudi fixer of assisting the hijackers. In fact he did.
Official story is that largest terrorist attack in history was carried out with no significant logistical support network in the US. I guess Atta and co must have worked extra shifts at the local 7/11 to pay for flying lessons and airline tickets. This not-network was then flown out of the US on special flights with state dept approval in the days following 9-11.