U.S. Air Force Col. Derek C. Oakley, incoming 28th Bomb Wing commander, gives a speech during a change of command ceremony at Ellsworth Air Force Base, South Dakota, June 23, 2023. Previously, Oakley was the commander of the 28th Operations Group at Ellsworth AFB where he commanded the largest operational B-1 Lancer group in the U.S. Air Force with one operational support squadron, two bomb squadrons and operations of the Powder River Training Complex. (U.S. Air Force Photo by Airman 1st Class Yendi Borjas)