Brig. Gen. Eric W. Crabtree, 4th Air Force Commander, shows the Senior Executive Service flag to his staff following an SES ceremony here on April 30th. General Crabtree was presented a SES lapel pin after taking the oath of office. His predecessor, Maj. Gen. Robert E. Duignan (Ret.) administered the oath.. (U.S. Air Force photo/2Lt. Zachary L. Anderson)