U.S. Air Force Senior Airman Gabriel M. Fox, Langley Honor Guard member, plays music during the POW/MIA Recognition Day ceremony at Joint Base Langley-Eustis, Va., Sept. 15, 2017. National POW/MIA Recognition Day is observed annually on the third Friday of September to remember those still missing in action and to honor prisoners of war. (U.S. Air Force photo by Airman 1st Class Alexandra Singer)