U.S. Air Force Airman with the 374th Civil Engineer Squadron guide Koku Jietai (Japan Air Self-Defense Force) engineers operating equipment to cut concrete during a rapid airfield damage repair demonstration, Dec. 12, 2017, at Yokota Air Base, Japan. The intention of the demonstrations was more than to showcase Yokota’s capabilities but to promote interoperability between the Koku Jietai and USAF engineers and operators. (U.S. Air Force photo by Senior Airman Donald Hudson)