1st Lt. Brad Leffler, 35th Fighter Squadron F-16 Fighting Falcon pilot, prepares for takeoff during Exercise Buddy Wing 15-4 at Kunsan Air Base, Republic of Korea, June 3, 2015. In an effort to enhance U.S. and ROKAF combat capability, Buddy Wing exercises are conducted multiple times throughout the year on the peninsula to sharpen interoperability between the allied forces so that if need be, they are always ready to fight as a combined force. (U.S. Air Force photo by Staff Sgt. Nick Wilson/Released)