Lance Cpl. Grant R. Burch, a rifleman with Charlie Company, 1st Battalion, 24th Marine Regiment, simulates clearing a room during urban warfare training during Exercise Arctic Eagle at Camp Grayling, Michigan, April 24, 2014. Marines joined members of the Army National Guard and the Danish Home Guard at this exercise to train counterinsurgency tactics and urban warfare. - Lance Cpl. Grant R. Burch, a rifleman with Charlie Company, 1st Battalion, 24th Marine Regiment, simulates clearing a room during urban warfare training during Exercise Arctic Eagle at Camp Grayling, Michigan, April 24, 2014. Marines joined members of the Army National Guard and the Danish Home Guard at this exercise to train counterinsurgency tactics and urban warfare.