Chiefs from the 944th Fighter Wing, congratulate Chief Master Sgt. Matthew Greene, 944th Maintenance Squadron munitions flight chief, for reaching the highest enlisted grade during an induction ceremony held at the Academic Training Center, Jan 6, 2018. Only one percent of the Air Force's total enlisted force can hold the top enlisted grade of Chief Master Sergeant. (U.S. Air Force photo by Staff Sgt. Lausanne Kinder)