Reply #4: The reviews would have been far better if the movie gave some context behind the attack -

[leveymg]

for instance, the White House and intelligence agencies were well aware of who the principal hijackers were and what they intended to do.

The plotters had been under surveillence since at least January 2000.

Yet, for some reason we still don't know, Bush and Condi refused to roll-up the al-Qaeda cells known to be inside the US, despite the urgings of top intelligence and counter-terrorism officers. See,

Scoop: UQ Wire: THE CRIMES OF 9/11 (Part 4)
In early summer 2001 , US officials received numerous warnings from domestic and foreign intelligence agencies that al-Qaeda terrorists planned ...

http://www.scoop.co.nz/stories/HL0310/S00257.htm