Participants in a ruck march challenge receive mentorship from their cadre while performing push-ups at Laughlin Air Force Base, Texas, Oct. 14, 2017. The ruck was a 10-kilometer march which contained various challenges along the course. (U.S. Air Force photo\Airman 1st Class Daniel Hambor)

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Photo by: Airman 1st Class Daniel Hambor |  VIRIN: 171014-F-IF668-0362.JPG