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Staff Sgt. Joseph Buch and Tech Sgt. Erin Eagleson, North Dakota Air National Guardsmen assigned to the 332nd Expeditionary Civil Engineer Squadron take a slump measurement while testing a fresh batch of concrete before her team pours a new slab of concrete at an undisclosed location in Southwest Asia Nov. 28, 2017. The sample is checked for fluidity and strength on the seventh and 28th day to ensure a proper product has been provided. (U.S. Air Force photo by Senior Master Sgt. Cohen A. Young)
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