Airmen process through a mobility line prior to leaving for Red Flag 15-2 at the Deployment Center at Ellsworth Air Force Base, S.D., Feb. 26, 2015. Red Flag exercises have provided training for more than 440,000 military personnel, including more than 145,000 aircrew members flying more than 385,000 sorties, logging more than 660,000 hours of flying time. (U.S. Air Force photo by Airman 1st Class Rebecca Imwalle/Released)