Video - 9/11: The Day That Changed America

On September 11, 2001, terrorists hijacked four airplanes in the United States. Two planes crashed into the Twin Towers of the World Trade Center in New York City, causing both towers to collapse. A third plane hit the Pentagon in Arlington, Virginia, while the fourth plane, United Airlines Flight 93, crashed into a field in Pennsylvania after passengers attempted to overcome the hijackers. Nearly 3,000 people were killed in these attacks, which led to significant changes in U.S. domestic and foreign policies, including the initiation of the War on Terror.