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.
History of the United States (1991–2008)
On the morning of September 11, 2001, four airliners were hijacked by 19 members of the terrorist organization al-Qaeda. The first hijacked airliner, American Airlines Flight 11, struck the North Tower of the World Trade Center at 8:46 A.M. (EST) in New York City; with a second, United Airlines Flight 175, striking the South Tower less than twenty minutes later at 9:03 A.M. (EST), resulting in the collapse of both 110 story skyscrapers, and the destruction of the World Trade Center. The third hijacked plane, American Airlines Flight 77, was crashed into the Pentagon (the headquarters of the United States Department of Defense) in Arlington County, Virginia, demolishing a section of the outer southwest facing wall. After discovering that their plane, United Airlines Flight 93, was going to be used as a missile, passengers attempted to regain control of the plane which had been redirected towards Washington, D.C. However, after regaining control from the hijackers, the plane crashed near a rural community near Shanksville, Pennsylvania. In total, the attacks killed 2,996 people—2,507 civilians, 343 firefighters, 72 law enforcement officers, 55 military personnel, and the 19 terrorists. The 9/11 attack was the single deadliest international terrorist incident and the most devastating foreign attack on American soil since the Japanese surprise attack on Pearl Harbor on December 7, 1941. It refocused American attention to a long war on terrorism, beginning with an attack on al-Qaeda and its Taliban supporters in Afghanistan.