30th OG superintendent promoted to chief
VANDENBERG AIR FORCE BASE, Calif. -- Col. David Hook, 30th Operations Group commander, administers the Oath of Enlistment to Chief Master Sgt. Matthew Lusson, the 30th OG superintendent, here Wednesday, Nov. 30, 2011. The rank of chief master sergeant is limited by federal law to only one percent of the Air Force enlisted force. (U.S. Air Force photo/Jerry E. Clemens, Jr.)