Staff Sgt. Jon Martinez, assigned to the 2nd Civil Engineer Squadron Dirt Boyz, stands in wet concrete as he evens it out at Barksdale Air Force Base, La., July 18, 2017. Martinez wore rubber overalls in order to keep the concrete’s corrosive chemicals off his skin.

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Size: 1731px × 1155px
Photo credit: © Bob Collet / Alamy / Afripics
License: Licensed
Model Released: No

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