Marine Corps Lance Cpl. Felix Castro, left, assists Lance Cpl. Kerry Muchison, both with 3d Low Altitude Air Defense Battalion, Marine Air Control Group 38, 3d Marine Aircraft Wing, with firing an M240B light machine gun during a live-fire training exercise at Marine Corps Base Camp Pendleton, Calif., Feb. 14, 2017. The training was conducted to ensure training and readiness requirements are met and enhance the unit’s proficiency with each weapon system. ( Marine Corps photo by Cpl. Trever Statz)

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Photo credit: © AB Forces News Collection / Alamy / Afripics
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