OSAN AIR BASE, Republic of Korea --   Five U.S. Air Force recruits participate in a swearing-in ceremony at Osan Air Base, Republic of Korea, June 8, 2018. For the first time, U.S. citizens living in Korea were able to proceed through the Military Entrance Processing Station process in one day instead of a three-part process used in the past. The oath of enlistment used in a swearing-in ceremony is a military oath made on the occasion of joining or reenlisting in the United States armed forces. (U.S. Air Force photo by Senior Airman Kelsey Tucker)