Staff Sgt. Michael Campbell, 51st Communications Squadron client systems technician, shoots back from a defensive fighting position during a mock attack from opposing forces at Osan Air Base, Republic of Korea, Aug. 25, 2016. The mock attack was a scenario during exercise Beverly Herd 16-2 designed to test Osan’s Airmen to test their ability to survive and operate during contingency operations. (U.S. Air Force photo by Staff Sgt. Jonathan Steffen)