United States invasion of Afghanistan
On the morning of 11 September 2001, al-Qaeda carried out four coordinated attacks on the United States. Four commercial passenger jet airliners were hijacked. The hijackers – members of al-Qaeda's Hamburg cell – intentionally crashed two of the airliners into the Twin Towers of the World Trade Center in New York City. Both buildings collapsed within two hours from fire damage related to the crashes, destroying nearby buildings and damaging others. The hijackers crashed a third airliner into the Pentagon in Arlington County, Virginia. The fourth plane crashed into a field near Shanksville, Pennsylvania, after some of its passengers and flight crew attempted to retake control of the plane, which the hijackers had redirected toward Washington, D.C., to target the White House or the United States Capitol. No flights had survivors. In total, 2,996 people, including the 19 hijackers, died and more than 6,000 others injured in the attacks. According to the New York State Health Department, 836 first responders, including firefighters and police personnel, had died as of June 2009.
Nawaf al-Hazmi
On September 10, 2001, Hazmi, along with Mihdhar and Hanjour checked into a hotel in Herndon, Virginia. The next morning, Hazmi and four other terrorists, boarded American Airlines Flight 77 at Dulles Airport and hijacked the plane so that Hani Hanjour could pilot and crash the plane into the Pentagon as part of the September 11 attacks. The crash killed all 64 passengers aboard the aircraft and 125 in the Pentagon. Hazmi was initially dismissed as a "muscle hijacker" following the attacks, but was later revealed to have played a larger role in the operational planning than previously believed. His younger brother, Salem al-Hazmi, was another of the hijackers aboard the same flight.