ELLSWORTH AIR FORCE BASE, S.D. – Airman 1st Class Shelly Jenkins, 28th Maintenance Squadron aircraft metals technology apprentice, repairs a floor panel for a bomb loader by using tungsten inert-gas welding, Sept. 30. TIG welding is a precise form of welding that can be performed on a variety of metals. (U.S. Air Force photo/Senior Airman Kasey Close)