Best of the best
U.S. Air Force Senior Master Sgt. Michael Knox, 18th Civil Engineer Squadron operations flight chief, is congratulated by Chief Master Sgt. Dustin Green, 18th Civil Engineer Group superintendent, Dec. 8, 2016, at Kadena Air Base, Japan. Eight of Kadena’s senior master sergeants were selected for promotion to the rank of chief master sergeant. (U.S. Air Force photo by Senior Airman Lynette M. Rolen/Released)