(9:20 a.m.) September 11, 2001: United Airlines Orders No New Takeoffs, at Least for International Flights

United Airlines orders its aircraft that have not yet taken off to remain on the ground. However, the exact time and details of this order are unclear. According to the 9/11 Commission, United orders the “ground stop” at an unstated time after about 9:10, when American Airlines had ordered a nationwide ground stop of its aircraft (see Between 9:00 a.m. and 9:10 a.m. September 11, 2001). [9/11 Commission, 7/24/2004, pp. 10] The Wall Street Journal reports that Andy Studdert, United Airlines’ chief operating officer, gives the order for United aircraft to remain “frozen on the ground” at 9:20. However, it only describes this order applying to “all international flights,” so whether it also applies to United’s domestic flights is unclear. [Wall Street Journal, 10/15/2001] The FAA will issue an order to all its facilities, initiating a “national ground stop,” at around 9:25 a.m. (see (9:26 a.m.) September 11, 2001). [Time, 9/14/2001] At around 9:45, United Airlines will order all its airborne flights to land (see (9:45 a.m.) September 11, 2001). [9/11 Commission, 1/27/2004]