Gunnery Sgt. Gilbert Stubb, a trainer with the Marine Corps Reserve, provides Soldiers from the 63rd Theatre Aviation Brigade with instructions on the M2 .50 caliber machine gun during their crew serve weapon class at Boone National Guard Center, Jan. 11-12, 2020. ( Army National Guard photo by Staff Sgt. Andrew Dickson)

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Photo credit: © Operation 2021 / Alamy / Afripics
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