Republic of Korea Maj. Gen. Jun-sik Kim, Air Combat Command commander, shakes the hand of Col. Jae-Gyun Jeon, 38th Fighter Group commander “Thor”, during the change of command ceremony at Kunsan Air Base, RoK, Jan. 17, 2018. Similar to the U.S. military tradition, the Korean change of command ceremony represents a formal transfer of authority and responsibility. (Courtesy photo)