U.S. Army and Air Force Airmen and Soldiers, assigned to the search and extraction team (S&E), Colorado National Guard, train with an evaluator to build wood stabilizers under concrete tunnels and slabs to ensure the safety of S&E teams, when rescuing people from a simlulated chemical attack during a joint exercise evaluation (EXEVAL) at Camp Rilea, Warrenton, Oregon, on Aug. 3, 2016. The EXEVAL ran for five days in a crawl, walk, run sequence, where they started off slowly, then transitioned into rapid response on evaluation day. (U.S. Air National Guard photo by Staff Sgt. Bobbie Reynolds)

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