Defender Challenge returns
The Air Mobility Command team receives the 3rd place medals and trophy for combat endurance during the 2018 Defender Challenge award ceremony at Joint Base San Antonio, Texas, Sept. 13, 2018. Teams were scored on their completion of a gruelling relay of calisthenics to increase their physiological stress level prior to firing at a target with their weapon. (Courtesy Photo)

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Photo by: (Courtesy Photo) |  VIRIN: 180628-F-XX000-003.JPG