Donald Rumsfeld
The United States was attacked on September 11, 2001 by al Qaeda terrorists who hijacked commercial airliners and crashed them in coordinated strikes into both towers of the World Trade Center in Lower Manhattan, New York City and the Pentagon in Washington, D.C. The fourth plane crashed into a field in Shanksville, Pennsylvania, and its target was likely a prominent building in Washington, D.C., most probably either the Capitol Building or the White House. Within three hours of the start of the first hijacking and two hours after American Airlines Flight 11 struck the World Trade Center, Rumsfeld raised the defense condition signaling of the United States offensive readiness to DEFCON 3, the highest it had been since the Arab-Israeli war in 1973.
Waleed al-Shehri
By 7:40 a.m., all five hijackers were aboard the flight, which was scheduled to depart at 7:45 a.m. Wail and Waleed al-Shehri sat together in first class in seats 2A and 2B respectively. The aircraft taxied away from Gate 26 and departed Logan International Airport at 7:59 a.m. from runway 4R after a 14-minute delay. The hijacking of Flight 11 began at approximately 08:14, which is when the pilot stopped responding to air traffic control. Once the hijacking began, the brothers are suspected of having stabbed two flight attendants. At 08:46:40, Mohamed Atta deliberately crashed Flight 11 into the northern facade of the North Tower (Tower 1) of the World Trade Center. The damage caused to the North Tower destroyed any means of escape from above the impact zone, trapping 1,344 people. The North Tower collapsed at 10:28, after burning for 102 minutes.