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.
King Fahad Mosque (Culver City, California)
According to FBI documents and a CIA memo noted in a congressional report into the attacks of September 11, 2001, the hijackers Khalid al-Midhar and Nawaf al-Hazmi may have been in contact with Saudi diplomat Shaykh al-Thumairy, who was the chief imam at the King Fahad Mosque (most of the 9/11 hijackers were Saudi nationals and several were not fluent in English and had little experience living in the West). According to the congressional report, the mosque was identified by the FBI as a site of “extremist-related activity both before and after September 11”. According top the commission, “several subjects of FBI investigations prior to September 11 had close connections to the mosque and are believed to have laundered money through this mosque to nonprofit organizations overseas affiliated with Usama Bin Ladin.”