USMC evolution
Marines and Airmen from Dyess Air Force Base, Texas, hump 60-lb. rucksacks for five miles at Camp Bowie, Texas, as part of their joint-service field training evolution Aug. 3. The Marine Reservists here, from Det-1, Motor Transportation Maintenance Co., do regular training and operational exercises and invited Airmen to join their experience. (U.S. Air Force photo by Senior Airman Carolyn Viss)