Lance Cpl. Jose Marroquin, electrical optical ordnance repair, 1st Battalion, 7th Marine Regiment, projects his ping pong using a make-shift sling shot during a 3D printing class aboard Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., Nov. 16, 2016. Over the three-day course, Marines were challenged to manufacture innovative solutions for the problems presented to them using 3D printing innovation.

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Keywords: archive, armed, defence, forces, mcagcc, military, reportage, servicemen, usa