Chips from a metal block sit on a computer numerical control base at Ellsworth Air Force Base, S.D., Jan. 6, 2016. The 28th Maintenance Squadron metals flight creates parts like pulleys and over-wing fairing brackets; discarding excess materials like the chips into a bin for safety control. The flight creates aircraft parts that cannot be ordered through a supplies list. (U.S. Air Force photo by Airman Sadie Colbert/Released)