A U.S. Air Force F-16 Fighting Falcon aircraft assigned to the 18th Aggressor Squadron launches from the runway May 5, 2015, during a RED FLAG-Alaska (RF-A) 15-2 mission at Eielson Air Force Base, Alaska. Aggressor pilots are trained to act as opposing forces in exercises like RF-A to better prepare U.S. and allied forces for aerial combat. (U.S. Air Force photo by Tech. Sgt. Miguel Lara III/Released)