Kentucky Air National Guardsmen begin the relay-race portion of the 123rd Airlift Wing Fitness Challenge at the Kentucky Air National Guard Base in Louisville, Ky., on Oct. 21, 2012. The challenge tested the ability of teams from across the base to complete a timed circuit that also included 80 pushups and 40 sit-ups. ( Air Force photo by Senior Airman Maxwell Rechel)

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Size: 1939px × 1288px
Photo credit: © RP Photo / Alamy / Afripics
License: Licensed
Model Released: No

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