President Barack Obama attends a ceremony honoring the 15th anniversary of the 9/11 attacks Sept. 11, 2016, at the Pentagon in Arlington, VA. (DoD photo by U.S. Air Force Tech. Sgt. Brigitte N. Brantley)
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/68842444@N03">Ash Carter</a>
CC BY 2.0
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