U.S. Air Force Staff Sgt. Jose A. Reyes, a 911th Air Refueling Squadron (ARS) dedicated crew chief, boards the aircraft upon completion of pre-flight checks before takeoff from Seymour Johnson Air Force Base, North Carolina, Dec. 12, 2019. This marks the last boots off the ground before the 911 ARS depart for their final mission on a KC-135 Stratotanker. (U.S. Air Force photo by Staff Sgt. Mary McKnight)