Wargames Were Cover For the Operational Execution of 9/11

Five if not six training exercises were in operation in the days leading up to and on the morning of 9/11. This meant that NORAD radar screens showed as many as 22 hijacked airliners at the same time. NORAD had been briefed that this was part of the exercise drill and therefore normal reactive procedure was forestalled and delayed

http://www.prisonplanet.com/articles/september2004/080904wargamescover.htm