U.S. Air Force Staff Sgt. William Heines, an 18th Aggressor Squadron baron controller, shows his enlisted stripes in relation to a pilot's squadron patch May 12, 2015, at Eielson Air Force Base, Alaska. Both Aggressor pilots and barons spend a large amount of time studying enemy aerial battle tactics from around the world and teach others how combat these threats. (U.S. Air Force photo by Staff Sgt. Shawn Nickel/Released)