Denis Heinz pins on Colonel
U.S. Air Force Col. Jon Ellis, Air Force Global Strike Command Mobilization Assistant to the Director of Operation, administers the oath of office to Col. Denis Heinz, 489th Bomb Group commander, during a ceremony that Heinz was promoted to the rank of Colonel on Barksdale Air Force Base, June 6, 2015. (U.S. Air Force photo by Master Sgt. Dachelle Melville/Released)