History of 9/11, Twenty Years Ago: Patriot Day

On 9/11, twenty years ago, more Americans were killed on American soil in one day than any attack since Pearl Harbor in 1941. A series of terrorist airplane highjacking attacks occurred in New York City, Pennsylvania, and the Pentagon… and the world changed. As the events of December 7, 1941, led to war, so too did the events of September 11, 2001.