Ceremonies and remembrances in the United States on Monday honored the 22nd anniversary of the September 11 terror attacks that killed nearly 3,000 people.
In Photos: US Marks 22 Years Since 9/11 Attacks
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A person holds a flag on the 22nd anniversary of the September 11, 2001 attacks on the World Trade Center at the National September 11 Memorial & Museum, in New York City.
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First responders watch as a U.S. flag is unfurled from the Pentagon roof to mark the 22nd anniversary of September 11, 2001 attacks, at the Pentagon in Washington.
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People pray before the commemoration ceremony on the 22nd anniversary of the September 11, 2001, terror attacks, in New York.
