HANSCOM AIR FORCE BASE, Mass. -- Ron Mason (left), director of the 653rd Electronic Systems Wing, passes the 753rd Electronic Systems Group command guidon to Ronnie Carter in a change of leadership ceremony June 25. Mr. Carter, who had previously served as director of the 853 ELSG, took over for Col. Leslie Blackham (right), who has moved on to a staff position within the Office of the Secretary of Defense in the Pentagon. (USAF Photo/Rick Berry)