Americans on Tuesday are marking the 17th anniversary of the Sept. 11, 2001 terrorist attacks that killed almost 3,000 people in New York, Virginia and Pennsylvania
US Marks 17th Anniversary of 9/11 Attacks

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A ribbon and roses are placed on one of the victims' name at the north reflecting pool of the National 9/11 Memorial in New York, Sept. 11, 2018.

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People hold up photo memorials during a ceremony marking the 17th anniversary of the terrorist attacks on the United States, Sept. 11, 2018, in New York.

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La-Shawn Clark, left, and Mark Cannizzaro read names of victims of the Sept. 11 attacks, Sept. 11, 2018, in New York. Clark lost her husband, Benjamin Clark, and Cannizzaro lost his cousin, Brian Cannizzaro.

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Bill Anders, left, and Sharon Custer ring bells as part of the Name Presentation and Ringing of Bells Remembrance during the September 11th Flight 93 Memorial Service in Shanksville, Pennsylvania, Sept. 11, 2018.