A U.S. Air Force crew chief, assigned to the 115th Fighter Wing, Wisconsin Air National Guard, performs maintenance on an F-16 Fighting Falcon at Kunsan Air Base, Republic of Korea, Aug. 22, 2017. The 115th Fighter Wing participated in a regularly-scheduled operational readiness exercise, Beverly Pack 17-3, as part of a Theater Security Package deployment to Kunsan. Pacific Air Forces TSPs signify a continued commitment to regional stability and security, while allowing units to train in the Pacific theater. (U.S. Air Force photo by 2nd Lt. Brittany Curry/Released)