Tech. Sgt. Kenneth Babb, 28th Maintenance Squadron metals technology assistant NCO in charge, explains metals technology to spouses of Airmen assigned to the 28th MXS during Spouse Appreciation Day at Ellsworth Air Force Base, S.D., May 11, 2012. Squadrons around the base organized a wide array of tours and activities designed to thank spouses for all they do and the important role they play in the lives of Airmen. (U.S. Air Force photo by Airman 1st Class Kate Thornton/Released)