Timeline of Attacks
8:45 a.m. - American Airlines Flight 11, carrying 92 people from Boston to Los Angeles, crashes into north tower of World Trade Center.
9:03 a.m. - United Airlines Flight 175, carrying 65 people from Boston to Los Angeles, crashes into south tower of World Trade Center.
9:40 a.m. - American Airlines Flight 77, carrying 64 people from Washington to Los Angeles, crashes into Pentagon.
9:50 a.m. - One World Trade Center - the North tower - collapses.
10:29 a.m. - Two World Trade Center - the South tower - collapses.
10:37 a.m. - Officials confirm that United Airlines Flight 93, carrying 45 people on route to San Francisco from Newark, New Jersey crashed 80 miles southeast of Pittsburgh.