Senior Airman James Chazotte, 28th Maintenance Squadron metals technology technician, welds together a crack on an aerospace ground equipment oil cart in the welding shop at Ellsworth Air Force Base, S.D., April 11, 2012. Aside from minor repairs, metals technology can also fabricate metal parts for various purposes. (U.S. Air Force photo by Airman 1st Class Kate Thornton/Released)