Gen. Tim Ray, Air Force Global Strike Command commander, and his wife, Rhonda, visit the 28th Maintenance squadron engineers on Ellsworth Air Force Base, S.D., May 26, 2021. Ray learned about an engine part recently innovated by the 28th Maintenance Squadron Metals Technology and Additive Manufacturing flight using cold spray. (U.S. Air Force photo by Airman 1st Class Jonah Fronk)