A Marine looks through a collimator, the primary aiming point for the M777 howitzer, during a gunner and assistant gunner course at Camp Lejeune, , Mar. 7, 2017. The course is designed to help artillery Marines improve their proficiency in operating the M777 howitzer and 120mm expeditionary fire support system. The students participating in the course are from 1st Battalion and 2nd Battalion, 10th Marine Regiment, 2nd Marine Division.

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Keywords: air, america, archive, armed, army, corps, defence, force, forces, howitzer, m777, marine, marines, military, mortars, navy, reportage, service, serviceman, servicemen, soldier, states, training, united, usa, usmc