Airmen from the 56th Maintenance Group honor former prisoners of war and those listed as missing in action during a 24-hour vigil run at Luke Air Force Base, Ariz., Sept. 20, 2019. During the event, Airmen ran for the 24-hour period while holding a POW/MIA flag as part of National POW/MIA Recognition Day. (U.S. Air Force photo by Airman 1st Class Jacob Wongwai)