Osan test their ATSO during Beverly Herd 16-2

Osan Air Base, Republic of Korea -- Senior Airman Charles Cooper, 51st Logistics Squadron vehicle maintenance journeyman, connects a freshly-charged battery during Exercise Beverly Herd 16-2 on Osan Air Base, Republic of Korea, Aug. 25, 2016. Cooper and other vehicle maintainers keep Osan’s fleet of vehicles running during the exercise enabling operations and defense of the base. (U.S. Air Force photo by Staff Sgt. Jonathan Steffen)