John Hendershot Profile: John Hendershot Events (2) (9:33 a.m.) September 11, 2001: Dulles Airport Supervisor Notifies Secret Service of Aircraft Approaching the White House 2001-09-11 9:34 a.m.- 9:37 a.m. September 11, 2001: Flight 77 Flies Complex Near-Circular Loop before Striking Pentagon 2001-09-11