Template:9:21 a.m. September 11, 2001: Dulles Airport Control Facility

9:21 a.m. September 11, 2001: Dulles Airport Control Facility Advised to Look for Flight 77
Herndon Command Center informs a supervisor at the Terminal Radar Approach Control (TRACON) at Washington Dulles International Airport that the FAA has lost contact with American Airlines Flight 77 and is trying to locate it. The Dulles TRACON then informs its air traffic controllers that a commercial aircraft is missing, and instructs them to look for primary targets on their radar screens. (A primary target is a radar track that provides an aircraft’s position and speed, but not its altitude, and which can still be viewed when the plane’s transponder has been turned off. [WASHINGTON POST, 9/11/2001; SALON, 9/10/2004] )

According to the 9/11 Commission, controllers at its TRACON will locate an unidentified aircraft on their radar screens at 9:32, although other accounts will suggest they locate the target slightly earlier. [FEDERAL AVIATION ADMINISTRATION, 9/17/2001 ;