source: History Commons Blog Dec 31, 2011
Numerous new entries have been added to the Complete 9/11 Timeline at History Commons, many of which deal with the US military’s actions around the time of–and in response to–the 9/11 attacks, while other new entries provide important information about the military’s responses to suspicious aircraft prior to 9/11.
New timeline entries describe how NORAD–the military organization responsible for defending US airspace–regularly launched fighter jets in response to suspicious aircraft in the years before 9/11, with fighters able to take off within minutes of a scramble order.
Other new entries describe a large Russian military exercise that began the day before 9/11 and was monitored by NORAD fighters that were deployed to Alaska and Northern Canada. The Russians promptly called off their exercise in response to the attacks in the US on September 11. As well as monitoring this Russian exercise, on September 11, personnel at the NORAD operations center in Cheyenne Mountain, Colorado, were participating in the annual training exercise Vigilant Guardian, which has been described as a “full-blown nuclear war” exercise.
more at the original source: