A 493rd Fighter Squadron climbs into his F-15C Eagle for a sortie in preparation for exercise Red Flag 17-2 at Nellis Air Force Base, Nev., Feb. 24. More than 440,000 service members have participated in Red Flag since 1975, including more than 145,000 air crew members flying more than 385,000 sorties and logging more than 660,000 flight hours. (U.S. Air Force photo/Senior Airman Malcolm Mayfield)