On the morning of September 11, 2001, NORAD was in the middle of running several military exercises, some of which simulated hijacked aircraft over American skies. James Corbett's film lays out the timeline of these drills, including Vigilant Guardian and Northern Vigilance, and asks how their overlap with the actual attacks affected the response of fighter jets and air traffic controllers that day. Using government documents, news archives, and statements from military officials, the film traces confusion in the chain of command and delays in scrambling interceptors, arguing that the drills were not incidental background noise but a central reason the response faltered. Corbett's narration walks through radar logs and public testimony point by point, building a case aimed at viewers already skeptical of the 9/11 Commission's account. The film sits squarely in the alternative-history tradition around that day, presenting its evidence methodically rather than through spectacle, and leaves the viewer with a specific, checkable claim about what NORAD knew and when.