Army Sgt. Yesenia Vargas, 95th Chemical Company, 2nd Engineer Brigade, sets the headspace and time on the M2 .50 caliber machine gun at a range in Joint Base Elmendorf-Richardson, Alaska, Aug. 14, 2012. Army machine gun marksmanship was based on the concept that Soldiers must be able to effectively apply their firing skills in combat. Teams consisting of a gunner and assistant gunner underwent basic non-firing training covering maintenance, immediate action drills, an initial 10-meter live fire grouping/setting course, and weapons qualification. Percy Jones

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Photo credit: © PJF Military Collection / Alamy / Afripics
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