Airman 1st Class Tyler Jones, 28th Maintenance Squadron aircraft metals technician, smoothes an aircraft nose bracket with a sanding disc at Ellsworth Air Force Base, S.D., July 30, 2013. Aircraft metals technicians are certified in metal repair, fabrication, metal composition, weld specifications, metal tempering, forging, mechanical drawings and the use of precision measuring devices, etc. (U.S. Air Force photo by Airman 1st Class Zachary Hada/Released)