In a society where the assasinations of JFK, RFK and MLK are always chalked up to a lone gunman by goverment commissions no matter how absurd, I do not believe history will ever allow anything but a revisionist version to exist for our latest Pearl Harbor event.
I do not believe Rumsfeld and Cheney types made 9-11 happen but in consideration of the plethora of stand down orders given, experts ignored and evidence of demolition charges, I am leaning to the let it happen scenario which some may argue is the same as "they" made it happen.
With no legal authority to justify such actions there is only the greater good or the ends justifying the means argument to be made.

Once one drives a tank over the Constitution we should not expect they will obey it in the future.