They could well have been flown to the Texas location after the air traffic resumed. Please, get a grip.
In which case the news story would be dead wrong about that. Not impossible, but the source story makes the clear distinction between the FBI "supervised" flights and other trips to the secret location before air traffic resumed, and their leaving the country after air traffic resumed.
It is also no use denying that U.S. ties to Saudi Arabia, and the bin Laden family in particular, were entirely too friendly and uncritical of Moslem radicalism.
Of course Moore is way operspinning this. But it is ugly all the same: The FBI goes around being armed flying nanny to bin Laden brats while I'm stuck in Europe for nearly a week.