US. Army Reserve soldiers Sgt. Robert Jackson assigned to the 386th Engineer Company in Las Vegas, wish participants luck at the beginning of the Tough Mudder event in San Diego, Nov. 9, 2013. Jackson is scheduled to participate in the 12-mile endurance challenge Nov 10, which includes 22 obstacles throughout the course. (U.S. Army photo by Staff Sgt. Marie Adams)
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SAN DIEGO, CA, US
This work, Tough Mudder 2013 [Image 1 of 21], by SSG Marie Adams, identified by DVIDS, is free of known copyright restrictions under U.S. copyright law.