Maj. Stephen Del Bagno, Thunderbird 4/Slot Pilot, (pictured third from the left) marches to his F-16 Fighting Falcon alongside the five other Thunderbird pilots during a practice show at Nellis Air Force Base, Nev., Mar. 14, 2018. Del Bagno was killed when his aircraft crashed on the Nevada Test and Training Range during a practice aerial demonstration on April 4, 2018. (U.S. Air Force Photo by Master Sgt. Christopher Boitz)