A 312th Training Squadron student bows his head during a moment of silence at the Prisoner of War and Missing in Action 24 hour remembrance run on the Mathis Fitness Center track on Goodfellow Air Force Base, Texas, Nov. 14, 2020. Over 1,500 American heroes are still missing and unaccounted for from the Vietnam War. (U.S. Air Force photo by Airman 1st Class Ethan Sherwood)