World Trade Center site
On the morning of September 11, 2001, Islamic terrorists affiliated with Al-Qaeda hijacked American Airlines Flight 11 and United Airlines Flight 175, both which were en route to Los Angeles, and intentionally crashed them into the two main towers of the World Trade Center. The towers collapsed within two hours of the collisions. 2,606 people, including 2,192 civilians, 71 law enforcement officers, and 343 firefighters, who were in the towers and in the surrounding area died in the attacks, as well as 147 civilians and the 10 hijackers aboard the two airliners. After the collapse of the World Trade Center, hospital workers and law enforcement officers began referring to the World Trade Center site as "Ground Zero".
Ziad Jarrah
On the morning of September 11, 2001, Jarrah, Saeed al-Ghamdi, Ahmed al-Nami and Ahmed al-Haznawi boarded United Airlines Flight 93 from Newark International Airport at gate A17 without incident, and sat in first-class seats near the cockpit. Before boarding, Ziad Jarrah called his girlfriend, Aysel Sengün, from a public telephone at the airport, repeating the words 'I love you' over and over. Due to the flight's delay, the plane took off at 8:41 am, five minutes before American Airlines Flight 11 crashed into the World Trade Center. The pilot and crew were notified of the first two hijackings that day, and were told to be on the alert. Within minutes, around 9:28 am, Flight 93 was hijacked as well. The 9/11 Commission stated that Jarrah was the pilot.