Republic of Korea air force pilots and maintainers prepare a KA-10 Woongbi for a flight during Buddy Wing 15-8 at Osan Air Base, ROK, Dec. 17, 2015. The purpose of the Buddy Wing program is to execute joint tactics, exchange ideas and improve interoperability between U.S. Air Force and ROKAF pilots maintainers and support personnel. (U.S. Air Force photo/Airman 1st Class Dillian Bamman)