U.S. Air Force Capt. Jacob “Apollo” Allen, 35th Fighter Squadron F-16 Fighting Falcon pilot, puts on his flight equipment prior to flying during exercise Max Thunder 15-1 at Gwangju Air Base, Republic of Korea, April 21, 2015. Max Thunder is a large-scale employment exercise designed to increase interoperability between U.S. and ROK forces, and ultimately enhance commitments to maintain peace in the region. (U.S. Air Force photo by Senior Airman Taylor Curry/Released)