Army Spc. Joe S. Carson climbs the staircase to a tower in the rubble pile to prepare for a search and extraction exercise after a simulated chemical attack during a joint exercise evaluation at Camp Rilea in Warrenton, Ore., Aug. 2, 2016. Carson is a maintenance mechanic assigned to the Colorado National Guard’s 365th Maintenance Company. Air National Guard photo by Staff Sgt. Bobbie Reynolds