The terrorist September 11 attacks were a series of four suicide attacks that were committed in the United States on September 11, 2001.
On that morning, 19 al-Qaeda terrorists hijacked four commercial passenger jet airliners. The hijackers intentionally crashed two of the planes into the Twin Towers of the World Trade Center in New York City, killing everyone on board and thousands of those working in the buildings. Both towers collapsed within two hours, destroying nearby buildings and damaging others.
A third airliner was crashed into the Pentagon. Hijackers had redirected the fourth plane toward Washington, D.C., targeting either the Capitol Building or the White House, but crashed it in a field near Shanksville in rural Pennsylvania after passengers attempted to retake control of the airliner. There were no survivors from any of the flights.
Nearly 3,000 victims died, including the 19 hijackers and 2,977 victims. Only 20 people escaped from the impact zone of the South Tower after it was hit and only four people from the floors above it.
Thousands of people whose loved ones were killed at the World Trade Center during the September 11th attacks made their annual pilgrimage Tuesday at ground zero.