Col. Michael A. Cooper, left, commander of the 123rd Medical Group, retires from military service during a ceremony at the Kentucky Air National Guard Base in Louisville, Ky., Sept. 11, 2022. Col. Hans F. Otto, right, is the unit's new commander. (U.S. Air National Guard photo by Dale Greer)

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Photo by: Dale Greer |  VIRIN: 220911-Z-VT419-0135.JPG