Senior Airman Justin Morris, 28th Maintenance Squadron metals technician, uses a hand grinder to trim an egress seat spacer in the Metals Shop at Ellsworth Air Force Base, S.D., March 25, 2014. Metals technology technicians are certified in welding specifications, metal tempering, forging, mechanical drawings and the use of precision measuring devices. (U.S. Air Force photo by Airman 1st Class Rebecca Imwalle/Released)