U.S. Air Force Col. John Gonzales, left, 51st Fighter Wing commander, passes a ceremonial guidon to Col. Michael Fea as he takes command of the 51st Medical Group at Osan Air Base, Republic of Korea, July 16, 2019. The 51st Medical Group provides the entire Department of Defense community in the Republic of Korea with a full spectrum of medical services, and responds to medical contingencies on and around Osan AB.