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![Members of the Air Force stand in front of the Wall of the Missing. Members of the Air Force stand in front of the Wall of the Missing.](/sites/default/files/styles/colorbox/public/galleries/27035965350_e62d9161be_o.jpg?itok=3zMIPiZJ)
A U.S. Air Force Honor Guard detail from Spangdahlem Air Base, Germany, stands ready to be called to conduct a ceremonial volley as part of a Memorial Day ceremony at the Luxembourg American Cemetery and Memorial in Luxembourg, May 28, 2016. (U.S. Air Force photo by Staff Sgt. Joe W. McFadden/Released)