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U.S. Marine Lance Cpl. Fernando Griego, gunner, Company K, 3rd Battalion, 4th Marine Regiment, 1st Marine Division, Marine Rotational Force Darwin, remotely fires an M1A1 Abrams with B Squadron 1st Armoured Regiment of the Royal Australian Armoured Corps, May 6, 2017. Marines remotely test fired the Abrams as a precaution after Australian Army soldiers had replaced the barrel ensuring its mission readiness.