Japan Air Self-Defense Force Staff Sgt. Mutsuhiro Karasuyama, Southwestern Composite Air Division civil engineer, cuts out a slab of concrete during a rapid runway repair simulation, Oct. 22, 2015, on Kadena Air Base, Japan. JASDF civil engineers from Naha Air Base trained side-by-side with Airmen from the 18th Civil Engineer Squadron to build bilateral relations and improve their combined runway repair capabilities. (U.S. Air Force photo by Senior Airman Omari Bernard)