U.S. Air Force Staff Sgt. Travis Drouin, 435th Construction and Training Squadron pavements and equipment maintenance craftsman, provides instruction on a volumetric mixer to members of the 435th Contingency Response Group during Hybrid Airman training at Ramstein Air Base, Germany, Nov. 7, 2019. The volumetric mixer prepares asphalt materials during the Rapid Airfield Damage Repair process. (U.S. Air Force photo by Capt. Daniel McKeown)
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