Across the United States, people are remembering the fallen and honoring the lives reshaped by the Sept. 11, 2001, terror attack. Nearly 3,000 people were killed 23 years ago as 19 al-Qaida hijackers seized control of four jetliners, sending two of the planes into New York’s World Trade Center, one into the Pentagon in Arlington, Virginia, and the fourth into a field in western Pennsylvania. It remains the deadliest terror attack in history.
In Photos: US honors fallen on 23rd anniversary of 9/11
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A New York Police Department honor guard holds an American flag during a 9/11 commemoration ceremony at Ground Zero, in New York, Sept. 11, 2024.

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Members of the military honor guard place roses on top of the memorial benches at the 9/11 Pentagon Memorial, in Washington, Sept. 11, 2024.

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Former New York City Mayor Rudy Giuliani, left, and former New York Gov. George Pataki, right, attend the 9/11 memorial ceremony on the 23rd anniversary of terror attacks, in New York, Sept. 11, 2024.

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Sam Pulia, left, police chief in Willow Springs, Illinois, places flags on the bronze parapets at the 9/11 Memorial on the 23rd anniversary of the terror attacks, in New York, Sept. 11, 2024.