LOUISVILLE, Ky. (WDRB) -- The deadliest terror attack on U.S. soil happened 22 years ago Monday, and several ceremonies were planned to observe the solemn anniversary.

Louisville city leaders gathered in downtown Louisville to honor the lives lost in the worst attack ever on American soil. The tribute and memorial started at 10:15 a.m. at the Louisville Fire Headquarters on Jefferson Street. Mayor Craig Greenberg was there to host the annual ceremony and remember Sept. 11, 2001, as the deadliest day in the history of fire service.

Louisville Fire 9_11 ceremony 2022

The Louisville Fire Department honored those who lost their life on 9/11 on Saturday, Sept. 11, 2022. (WDRB/archive)

Nineteen terrorists from the Islamist extremist group Al Qaeda hijacked four airplanes and crashed two of them into the World Trade Center towers in New York City. A third plane crashed into the Pentagon in Virginia. 

Passengers on a fourth plane — United Flight 93 — fought back against the hijackers, forcing the plane to crash into an empty field in western Pennsylvania.

Nearly 3,000 people were killed in the attacks.

Multiple memorials happened around Kentuckiana on Monday to honor those killed, including one in Jeffersontown at the First Responders Remembrance Plaza on Watterson Trail.

Fort Knox held a Patriot Day Ceremony at the Kentucky Veterans Cemetery in Radcliff.

In southern Indiana, the city of Columbusmarked the anniversary at the Columbus City Hall Plaza at 8:30. 

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