Remember September 11, 2001.
On September 11, 2001, 19 militants associated with the Islamic
extremist group al-Qaeda hijacked four airliners and carried out suicide
attacks against targets in the United States. Two of the planes were
flown into the towers of the World Trade Center in New York City, a
third plane hit the Pentagon just outside Washington, D.C., and the
fourth plane crashed in a field in Pennsylvania. Often referred to as
9/11, the attacks resulted in extensive death and destruction,
triggering major U.S. initiatives to combat terrorism and defining the
presidency of George W. Bush. Over 3,000 people were killed during the
attacks in New York City and Washington, D.C., including more than 400
police officers and firefighters.
Also remember Benghazi.