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U.S. Marines with Marine Wing Support Squadron (MWSS) 171, monitor a hose as it pumps water into a drainage ditch during airfield damage and repair training at Marine Corps Air Station Iwakuni, Japan, April 19, 2017. The ADR training required Marines to utilize their skill set to tactically and proficiently fix any anomalies to a simulated damaged airfield. The training focused on becoming more efficient in situations that may require Marines to act in real-world scenarios to maintain the tempo of aircraft operations.