Private First Class Luis Becerra uses the dial system on the sight to find his reference point during Reconnaissance, Selection, and Occupying Position training at Camp Lejeune, , Jan. 6. Approximately ten Marines with Aplha Battery, 1st Battalion, 10th Marine Regiment took turns operating the 120 mm mortar to familiarize themselves with the weapon system in preparation for an upcoming gunner course. Becerra is a field artillery cannoneer with the battery.

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Keywords: 10th, 1st, archive, armed, artillery, battalion, cannoneers, defence, field, forces, marine, military, occupying, position, reconnaissance, regiment, reportage, selection, servicemen, training, usa