OSAN AIR BASE, South Korea – Capt. Young-Kwon Ko (right) a KF-16C Fighting Falcon pilot, shares a laugh with his crew chief, Master Sgt. Seong Weon Seo, both assigned to the 157th Tactical Fighter Squadron, Seosan Air Base, Republic of Korea Air Force, prior to Capt. Ko’s Buddy Wing sortie with U. S. Air Force pilots assigned to the 36th Fighter squadron Dec. 11 to 13. The purpose of the Buddy Wing program is to exchange ideas, introduce tactics and improve interoperability between the U.S. and Republic of Korea Air Forces. (U. S. Air Force photo by Senior Master Sgt Marvin Krause)