PETERSON AIR FORCE BASE, Colo. — Dennis and Kliffa Hall hold a photo of their late son, Capt. Ryan Hall, at Peterson Air Force Base, Colorado, on November 14, 2018. Capt. Hall died on February 18, 2012 when his single-engine U-28 aircraft went down returning from an intelligence, surveillance and reconnaissance mission in Djibouti on the Horn of Africa. (U.S. photo by Staff Sgt. Alexandra M. Longfellow/Released)