Rounds for the GAU-21 .50 caliber weapon system hang from an ammunition container on a CH-53E Super Stallion before a training mission in the desert outside of El Centro, Calif., aboard Marine Corps Air Station Miramar, Calif., July 17. Staff Sgt. Frankli

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Rounds for the GAU-21 .50 caliber weapon system hang from an ammunition container on a CH-53E Super Stallion before a training mission in the desert outside of El Centro, Calif., aboard Marine Corps Air Station Miramar, Calif., July 17. Staff Sgt. Franklin Williams, an aviation ordnance technician with Marine Heavy Helicopter Squadron 465 "Warhorses" and a San Diego native, and the rest of the crew members fired 24,000 of these .50 caliber rounds into targets on the ground during their training session.

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Photo credit: © MixPix / Alamy / Afripics
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