Dover Air Force Base Honor Guard members prepare to fire a volley salute during a retreat ceremony commemorating National POW/MIA Recognition Day on Dover AFB, Delaware, Sept. 17, 2021. The volley is an old battleground tradition, in which the two warring sides would cease hostilities to clear their dead from the battlefield. (U.S. Air Force photo by Mauricio Campino)

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Photo by: Mauricio Campino |  VIRIN: 210917-F-DA916-2073.JPG