Major General Larry Arnold, the commander of the Continental United States NORAD Region (CONR), participates in a video teleconference with other senior NORAD officials and is therefore unavailable when NORAD’s Northeast Air Defense Sector (NEADS) tries contacting him for authorization to scramble fighter jets in response to the hijacked Flight 11. [Filson, 2002; 9/11 Commission, 5/23/2003; 9/11 Commission, 7/24/2004, pp. 20; Spencer, 2008, pp. 31] Arnold is in the video teleconferencing room at CONR headquarters, at Tyndall Air Force Base, Florida.
Teleconference Discussing ‘Russian Exercise’ – Robert Del Toro, an intelligence officer with the 1st Air Force who is in the room with Arnold, will tell the 9/11 Commission that the teleconference is “about the Russian exercise.” [9/11 Commission, 2/2/2004 ] Del Toro is presumably referring to either the Russian Air Force exercise that NORAD is currently monitoring (see September 9, 2001) or the exercise, Vigilant Guardian, that NORAD is currently running, which reportedly includes a simulated war against Russia (see (8:00 a.m.) September 11, 2001). [North American Aerospace Defense Command, 9/9/2001; Arkin, 2005, pp. 545; Denver Post, 8/28/2011]
NORAD Officials from US and Canada on Teleconference – It is unclear exactly who else is participating in the teleconference. Arnold will tell the 9/11 Commission that as well as “our folks”—presumably referring to some of his colleagues at CONR—it includes “the NORAD staff.” The “NORAD staff” presumably includes officials from NORAD’s operations center in Cheyenne Mountain, Colorado, and its headquarters at Peterson Air Force Base, Colorado. [9/11 Commission, 5/23/2003] Arnold will tell author Leslie Filson that the teleconference includes “the CINC”—presumably meaning General Ralph Eberhart, the commander in chief of NORAD, who is at Peterson Air Force Base—and also officials from the Alaskan NORAD Region (ANR) and the Canadian NORAD Region (CANR). [Filson, 2002; 9/11 Commission, 3/1/2004 ]
Arnold Not Alerted to Hijacking – While Arnold is on the teleconference, NEADS calls CONR to alert him to the suspected hijacking of Flight 11 (see (8:38 a.m.) September 11, 2001), but no one at CONR interrupts the teleconference to fetch him or pass on to him the urgent message from NEADS. Arnold will only learn of the hijacking after the teleconference ends (see (8:40 a.m.) September 11, 2001) and he will then call NEADS back (see (8:42 a.m.) September 11, 2001). [9/11 Commission, 5/23/2003; Spencer, 2008, pp. 31, 38]