Participants cross the starting line to begin the 2017 Defenders of Liberty Mud Run at Barksdale Air Force Base, La., April 1. More than 500 people ran the four-mile course, braving 20 obstacles designed to test the physical and mental limits, and included wooden structures, multiple rope climbs and mud pits. ( Air Force photo/Senior Mozer O. Da Cunha)

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Size: 4130px × 2755px
Photo credit: © AB Forces News Collection / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: #2bw, #afgsc, #airman, #airmen, #barksdale, #barksdaleafb, #competition, #fitness, #morale, #race