I haven't seen or heard this Christian Science Monitor article mentioned elsewhere.

I can understand Moore's thoughts about the hijackers based on what he knew when he was writing. Based on this article the FAA & government knew a hijacking was going on before the first crash, what they did not know was what was planned. Frantic Cell phone calls from the planes did give information about who the hijackers were. Moore & we did not know all this, but the government did. The early fingering of Bin Ladin does not seem, in retrospect, to have been inappropriate.