U.S. Naval Academy graduates toss their hats. 美國海軍學院的畢業生扔帽子

U.S. Naval Academy graduates toss their hats in the air during graduation ceremonies at the U.S. Naval Academy in Annapolis, Maryland.
May 27, 2016
http://www.voanews.com/media/photogallery/day-in-photos-may-27-2016/3349128.html
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