ROBINS AIR FORCE BASE, Ga. -- Tracy Rycroft, 402nd Commodities Maintenance Group mechanical engineering technician with the Metrology and Additive Manufacturing Lab, shows the type of material used by their 3D printer at Robins Air Force Base, Georgia, Feb. 10, 2021. The 3D printer, which uses a plastic printing process called fused deposition modeling and it extrudes a tiny bead of plastic through a heated nozzle layer by layer until it builds a part from a Computer-Aided Model. (U.S. Air Force photo by Joseph Mather)