Col. Charles M. Combs, right, accepts the guidon and command of the 433rd Maintenance Group from 433rd Mission Support Group commander, Col. Craig S. Petersen, on Sept. 11, 2011, during an assumption of command ceremony at the 433rd Airlift Wing fuel cell at Lackland Air Force Base, Texas. (U.S. Air Force photo/Master Sgt. Collen McGee)