U.S. Marines with Reparable Maintenance Company, 1st Maintenance Battalion, 1st Marine Logistics Group, 3-D printed a broken mounting bracket for a Logistics Vehicle System Replacement during exercise Steel Knight at Marine Corps Air Ground Combat Center Twentynine Palms, Calif., Dec. 8, 2016. The orginal mounting bracket, left, was 3-D printed in plastic, right, to test the fit, form and function before being welded together as a final product. Steel Knight 2017 is a 1st Marine Division-led exercise that exposes Marines and Sailors to skill sets necessary to operate as a fully capable Marine air ground task force. (U.S. Marine Corps photo by Sgt. Abbey Perria) - U.S. Marines with Reparable Maintenance Company, 1st Maintenance Battalion, 1st Marine Logistics Group, 3-D printed a broken mounting bracket for a Logistics Vehicle System Replacement during exercise Steel Knight at Marine Corps Air Ground Combat Center Twentynine Palms, Calif., Dec. 8, 2016. The orginal mounting bracket, left, was 3-D printed in plastic, right, to test the fit, form and function before being welded together as a final product. Steel Knight 2017 is a 1st Marine Division-led exercise that exposes Marines and Sailors to skill sets necessary to operate as a fully capable Marine air ground task force. (U.S. Marine Corps photo by Sgt. Abbey Perria)