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People gather at the “Tribute in Light” in Lower Manhattan, New York, September 9, 2015. The tribute was lit two days ahead of the 14th anniversary of the 9/11 terrorist attacks
President Barack Obama, first lady Michelle Obama, Vice President Joe Biden, and others, stand on the South Lawn of the White House in Washington on Thursday, as they observe a moment of silence to mark the 13th anniversary of the 9/11 attacks
Part of the World Trade Center stands inside the library as part of the tour that the public are able to see on the day the George W. Bush Presidential Library opens for the first time to the public on the campus of Southern Methodist University in Dallas, Texas.