U.S. Air Force Col. Steven Kimball (left), 27th Special Operations Mission Support Group commander, hands the 27th Special Operations Civil Engineer Squadron guidon to U.S. Air Force Lt. Col. Daniel Guinan, 27th SOCES incoming commander at Cannon Air Force Base, N.M., July 14, 2010. The change of command ceremony is a time-honored tradition that allows the unit to witness the old commanders relinquish their position and for new commanders to assume their roles over the squadron. (U.S. Air Force photo by Staff Sgt. Heather R. Redman/Released)