United Airlines contacts American Airlines and notifies it of the crash of Flight 93. [9/11 Commission, 8/26/2004, pp. 47] Flight 93 crashed in Pennsylvania shortly after 10:00 a.m. (see (10:06 a.m.) September 11, 2001). United Airlines received confirmation of this by 10:15 (see (10:07 a.m.-10:15 a.m.) September 11, 2001).