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

Bill Petro
3 min readSep 9, 2022

On 9/11, twenty-one years ago, more Americans were killed on American soil in one day than in 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.

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Bill Petro

Writer, historian, technologist. Former Silicon Valley tech exec. Author of fascinating articles on history, tech, pop culture, & travel. https://billpetro.com