Tech. Sgt. Vincent Lopez, 365th Training Squadron comm/nav section chief, carries the POW/MIA flag to commence the National POW/MIA Day ceremony, Sept. 21, 2018, at Sheppard Air Force Base, Texas. The 24-hour vigil that started at the track near Lt. Gen. Leo Marquez Boulevard North concluded at the Sheppard Club, in which Airmen gathered to pay respect for those captured or missing in action, past and present. (U.S. Air Force photo by Christopher Carranza)