Japan Air Self-Defense Force Airman 1st Class Matsusaka, from the Southwestern Civil Engineering Group, shovels materials for concrete production during a rapid airfield damage repair exercise Aug. 30, 2019, at Naha Air Base, Japan. The week-long bilateral exercise, which occurs twice a year, involves a variety of engineering mission sets, to include aircraft barrier arresting systems, water purification, and airfield repair operations. By regularly training together U.S. and Japanese airmen can more effectively execute large-scale engineering responses to contingencies. (U.S. Air Force photo by Staff Sgt. Peter Reft)