A computer numeric controller router creates a C-130 Hercules crew door arm clamp in the fabrication shop at Yokota Air Base, Japan, June 23, 2015. A CNC router is a computer controlled cutting machine related to the hand held router used for cutting various hard metals, such as wood composites, aluminum, steel, plastics and foams. (U.S. Air Force photo by Senior Airman David Owsianka/Released)