LANGLEY AIR FORCE BASE, Va. -- Col. Kenneth J. D’Alfonso, 633d Mission Support Group commander, speaks to the audience during the 633d MSG change of command ceremony July 1, at the 71st Fighter Squadron hangar. Colonel D’Alfonso assumed command from Col. J. Kevin Altman, who is retiring after more than 24 years of service. (U.S. Air Force photo/Senior Airman Dana Hill)