Members of a tank crew with the Tennessee Army National

Members of a tank crew with the Tennessee Army National Guard’s H Troop, 2nd Squadron, 278th Armored Cavalry Regiment kick up dust as they race against the clock to their next land navigation point on an M1A1 Abrams tank while competing in the Gen. Gordon Sullivan Cup best tank crew competition at Fort Benning, Ga., Tuesday, May 3, 2016. The Sullivan Cup tests tank crews from throughout the Army on everything from gunnery to mounted land navigation, maintenance and combat casualty care in a variety of physically and mentally challenges setting to determine the Army’s best tank crew. (U.S. Army photo by Sgt. 1st Class Jon Soucy)