9/11

On September 11, 2001—a clear, sunny, late summer day—al Qaeda terrorists aboard three hijacked passenger planes carried out coordinated suicide attacks against the World Trade Center in New York City and the Pentagon in Washington, D.C., killing everyone on board the planes and nearly 3,000 people on the ground. A fourth plane crashed into a field near Shanksville, Pennsylvania, killing all on board, after passengers and crew attempted to wrest control from the hijackers. Below is a chronology of the events of 9/11 as they unfolded. All times are Eastern Daylight Time (EDT).

• 7:59 am – American Airlines Flight 11, a Boeing 767 with 92 people aboard, takes off from Boston’s Logan International Airport en route to Los Angeles.

• 8:14 am – United Airlines Flight 175, a Boeing 767 with 65 people aboard, takes off from Boston; it is also headed to Los Angeles.

• 8:19 am – Flight attendants aboard Flight 11 alert ground personnel that the plane has been hijacked; American Airlines notifies the FBI.

• 8:20 am – American Airlines Flight 77 takes off from Dulles International Airport outside of Washington, D.C. The Boeing 757 is headed to Los Angeles with 64 people aboard.

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• 8:24 am – Hijacker Mohammed Atta makes the first of two accidental transmissions from Flight 11 to ground control (apparently in an attempt to communicate with the plane’s cabin).

• 8:40 am – Air traffic controllers at The Federal Aviation Administration (FAA) alert North American Aerospace Defense Command (NORAD)’s Northeast Air Defense Sector (NEADS) about the suspected hijacking of Flight 11. In response, NEADS located at Cape Cod’s Otis Air National Guard Base to locate and tail Flight 11; they are not yet in the air when Flight 11 crashes into the North Tower.

• 8:40 am – Air traffic controllers at The Federal Aviation Administration (FAA) alert North American Aerospace Defense Command (NORAD)’s Northeast Air Defense Sector (NEADS) about the suspected hijacking of Flight 11. In response, NEADS scrambles two fighter planes located at Cape Cod’s Otis Air National Guard Base to locate and tail Flight 11; they are not yet in the air when Flight 11 crashes into the North Tower.

• 8:41 am – United Airlines Flight 93, a Boeing 757 with 44 people aboard, takes off from Newark International Airport en route to San Francisco. It had been scheduled to depart at 8:00 am, around the time of the other hijacked flights.

• 8:46 am – Mohammed Atta and the other hijackers aboard American Airlines Flight 11 crash the plane into floors 93-99 of the North Tower of the World Trade Center, killing everyone on board and hundreds inside the building.