In this Sept. 11, 2015 photo, President Barack Obama, first lady Michelle Obama, and others, pause on the South Lawn of the White House in Washington as they observe a moment of silence to mark the 14th anniversary of the 9/11 attacks. President Barack Obama is joining the nation in remembering the nearly 3,000 people who died in the Sept. 11 attacks 15 years ago Sunday, Sept. 11, 2016. Photo: AP Photo/Andrew Harnik, File  / Copyright 2016 The Associated Press. All rights reserved.
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