Col. John Edwards, 28th Bomb Wing commander, greets Secretary of the Air Force Heather Wilson, as she arrives at Ellsworth Air Force Base, S.D., June 25, 2018. During her visit, Wilson toured the new 28th Security Force’s Little Defender’s Den and state-of-the-art Cold Spray station inside the 28th Maintenance Squadron. (U.S. Air Force photo by Nicolas Z. Erwin)