U.S Air Force Tech. Sgt. Chris Barnes, an Aircraft Structural Maintenance (ASM) repairman with the 139th Airlift Wing Maintenance Squadron Missouri Air National Guard, works on fabricating a new throttle quadrant cover for a C-130H Hercules air craft at Rosecrans Air National Guard base in Saint Joseph Mo., on December 9, 2014. ASM repairmen fabricate sheet metal repairs, fix dents and cracks, as well as painting and corrosion control on the aircraft. (U.S. Air National Guard photo by: Senior Airman Sheldon Thompson/Released)