Glenn Michael Profile: Glenn Michael Events (2) (Between 8:13 a.m. and 8:21 a.m.) September 11, 2001: Flight 11 Transponder Turned Off 2001-09-11 (8:21 a.m.) September 11, 2001: Boston Controller Suspects Something Seriously Wrong with Flight 11, but NORAD Not Notified 2001-09-11