– Flight attendants on AA 11 alert ground personnel that the plane has been hijacked. Hijackers have sprayed mace and stabbed two people.

– Five stories of the Pentagon collapse due to fire and damage. Aftermath & Immediate Response 12:16 PM – All commercial air traffic in the U.S. is successfully grounded. Over 4,500 flights are diverted or canceled.

– United Airlines Flight 93 (Newark to San Francisco) takes off—40 minutes behind schedule due to airport congestion. Four hijackers are on board. The Attacks Begin 8:46 AM – AA 11 crashes into the North Tower (1 WTC) of the World Trade Center between floors 93 and 99. All on board are killed. Hundreds inside the tower are killed instantly; thousands are trapped above the impact zone.

– AA 77 crashes into the Pentagon in Arlington, Virginia, killing all 64 aboard and 125 military and civilian personnel inside.