Republic of Korea Air Force Col. Cha, Jun Seon, 38th Fighter Group commander, inspects an F-16 Fighting Falcon during a corrosion control brief at Kunsan Air Base, ROK, July 18, 2017. Cha participated in an immersion that allowed him to see U.S. and ROKAF capabilities and what they can do to strengthen their relationship. (U.S. Air Force photo by Senior Airman Michael Hunsaker)