From the time of deviation from submitted flight path to impact, FAA should have known the hijacking for about 30 minutes.
Was FAA and FBI aware of the conspiracy after crashing at WTC and were there any other plane deviated from regular flight path at that time?
It was a wise decision to ground all flights over the America yesterday.
From the flight path, transponder was turned off and precision flying, there is little doubt, those planes were commanded by trained pilots.
My condolence to Americans and may those RIP.
http://www.washingtonpost.com/wp-srv...jack091101.htm