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".
United 93 (film)
Meanwhile, newly promoted FAA National Operations Manager Ben Sliney is in a meeting when it is reported that American Airlines Flight 11 from Boston to Los Angeles has been hijacked after Mohamed Atta is overheard on the radio saying "We have some planes". Minutes later the aircraft crashes into the North Tower of the World Trade Center. Much to Sliney and his staff's horror, they learn that a second flight, United Airlines Flight 175 also from Boston to Los Angeles, has been hijacked, and after New York air traffic controllers attempt to contact the aircraft, it is seen live on CNN plowing into the South Tower of the World Trade Center. Sliney and his staff realize they are dealing with several hijackings and order the military to be on the lookout for American Airlines Flight 77, which is reported missing and presumed to have also been hijacked.