Republic of Korea Air Force pilots from the 123rd Tactical Fighter Squadron, Seosan Air Base, attend a preflight briefing at Kunsan Air Base, ROK, for Exercise Buddy Wing 15-4, June 4, 2015. During the five-day exercise, the 20th FW pilots, maintenance and support personnel integrated with Wolf Pack Airmen on all aspects of the exercise to include mission planning, briefing, execution and debriefing. (U.S. Air Force photo by Staff Sgt. Nick Wilson/Released)