U.S. Air Force Maj. Christina Encina, 7th Medical Support Squadron diagnostics flight commander, hands over the prisoner of war/missing in action flag to Tech. Sgt. David Stai, 7th Aircraft Maintenance Squadraon B-1B Lancer production expeditor, at Dyess Air Force Base, Sept. 16, 2016. The POW/MIA flag was designed during the Vietnam war and carries no trademark nor copyright to allow for nonrestrictive, widespread use. (U.S. Air Force photo by Airman 1st Class Rebecca Van Syoc)