Chief Master Sgt. Diena Mosely, 82nd Training Wing command chief master sergeant, addresses NCO academy students at Sheppard Air Force Base, Texas, Oct. 3, 2019. Sheppard NCOA Class 20-1, according to the Enlisted Professional Military Education registrar's office at the Thomas N. Barnes Center for Enlisted Education at Maxwell AFB, Alabama, is the largest NCOA class on record, edging out Tyndall AFB, Florida, Airey NCOA Class 19-2, 285-284. (U.S. Air Force photo by John Ingle)