Ellsworth Airmen board a plane on the flight line at Ellsworth Air Force Base, S.D., en route to Nellis Air Force Base, Nev. for a Red Flag training exercise July 11, 2014. The exercise features aerial combat training scenarios designed to challenge and prepare participants for real-world combat and includes live munition bombing runs on the Nevada Test and Training Range . (U.S. Air Force photo by Senior Airman Anania Tekurio/Released)