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Image: 15th anniversary of 9/11 terror attacks in New York

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America Marks 15th Anniversary of 9/11 Terror Attacks

Memorial services were held on Sunday to mark the 15th anniversary of the 9/11 terror attacks.

/ 14 PHOTOS
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Firefighters perform the changing of the guard at the FDNY Memorial Wall near the World Trade Center on Sept. 11, 2016.

— Craig Ruttle / AP
Image: 15th Anniversary Of 9/11 Attacks Commemorated At World Trade Center Memorial Site

A man holds a sign as he attends the ceremony for the victims of the terrorist attacks at the National September 11 Memorial and Museum.

— Spencer Platt / Getty Images
Image: 15th anniversary of 9/11 terror attacks in New York

A man places a paper into the 9/11 memorial names during the anniversary memorial service in New York.

— JOHN TAGGART / EPA
Image: Firefighters arrive for a memorial service at the World Trade Center complex on the morning of the 15th anniversary of the 9/11 attacks in Manhattan, New York

Firefighters arrive for a memorial service at the World Trade Center complex.

— ANDREW KELLY / Reuters
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Ann McGuire pays her respects at the Steel Beam Memorial in Jacksonville, North Carolina.

— John Althouse / AP
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A firefighter stands as part of an honor guard at the FDNY Memorial Wall.

— Craig Ruttle / AP
Image: Dellin Betances, Joe Girardi

New York Yankees pitcher Dellin Betances, left, and manager Joe Girardi carry a wreath to the September 11th memorial in Monument Park at Yankee Stadium.

— Kathy Kmonicek / AP
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President Barack Obama sits onstage before delivering remarks at an observance ceremony at the Pentagon.

— Cliff Owen / AP
Image: 15th Anniversary Of 9/11 Attacks Commemorated At World Trade Center Memorial Site

Firefighters hold out a flag during the commemoration ceremony at the National September 11 Memorial and Museum.

— Spencer Platt / Getty Images
Image: 15th anniversary of 9/11 terror attacks in New York

A flag stands amid names on the 9/11 memorial before the start of the anniversary memorial service to 9/11 victims in New York.

— JOHN TAGGART / EPA
Image: 15th Anniversary Of 9/11 Attacks Commemorated At World Trade Center Memorial Site

A girl holds her mother during a commemoration ceremony for the victims at the National September 11 Memorial and Museum.

— Spencer Platt / Getty Images
Image: 15th Anniversary Of 9/11 Attacks Commemorated At World Trade Center Memorial Site

People attend a commemoration ceremony at the National September 11 Memorial and Museum.

— Spencer Platt / Getty Images
Image: A man ties a memorial ribbon to the exterior wall of St. Paul's Chapel on the morning of the 15th anniversary of the 9/11 attacks in Manhattan, New York

A man ties a memorial ribbon to the exterior wall of St. Paul's Chapel In Manhattan, New York.

— ANDREW KELLY / Reuters
Image: Police officers stand outside Ground Zero on the morning of the 15th anniversary of the 9/11 attacks in Manhattan, New York, U.S.

Police officers stand outside Ground Zero.

FULL COVERAGE: Remembering 9/11

— ANDREW KELLY / Reuters
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