Retired Chief Master Sgt. of the Air Force Rodney McKinley speaks with students and instructors of the 362nd Training Squadron as part of his visit to Sheppard Air Force Base, Texas, Sept. 30, 2016. McKinley first attended Sheppard for his technical training in the medical career field over 42 years ago, and later returned for his training as a crew chief. (U.S. Air Force photo/2nd Lt. Brittany Curry)