Americans are marking the 18th anniversary of the Sept. 11, 2001 terrorist attacks that killed almost 3,000 people in New York, Virginia and Pennsylvania.
In Pictures: Americans Mark Anniversary of 9/11 Attacks
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A man holds a photo of a victim during a ceremony marking the 18th anniversary of the attacks of Sept. 11, 2001 at the National September 11 Memorial, Sept. 11, 2019, in New York.
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Members of Congress gather at the Capitol in Washington to observe the anniversary of the Sept. 11, 2001, terror attacks, Sept. 11, 2019.
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A U.S. flag hanging from a steel girder, damaged in the Sept. 11, 2001 attacks on the World Trade Center, blows in the breeze at a memorial in Jersey City, New Jersey, Sept. 11, 2019
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New York City Fire Department (FDNY) firefighters salute near the World Trade Center site on the 18th anniversary of the 9/11 attacks in lower Manhattan in New York, Sept. 11, 2019.
