FALSE! Sonbanger.Exercises were going on as far as two years before 9/11 and on the morning of 9/11. On 9/11 the war games confused the FAA and NORAD as to which were real and which were war games.
The Federal Aviation Administration has evidence of a hijacking and is asking for NORAD support. This is not part of the exercise.
In a flash, Operation Northern Vigilance is called off. Any simulated information, what's known as an "inject," is purged from the screens.