At the 9/11 memorial ceremony in New York City (12 images)

People gathered at the National September 11 Memorial & Museum near One World Trade Center in New York City on Monday, the 16th anniversary of the terrorist attacks, to honor those killed at Ground Zero on Sept. 11, 2001.
Updated: Sept. 11, 2017 at 10:41 AM
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An airline pilot places a flower at the reflecting pools at the 9/11 memorial. Photo by Ray Stubblebine/UPI
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