CANNON AFB, N.M. - Col. Stephen Clark, 27th Special Operations Wing commander, presents Col. Scott Corcoran, 27th Special Operations Medical Group commander, with the 27 SOMDG guidon during a change of command ceremony July 22. Colonel Corcoran assumed command of the Medical Group from the outgoing commander, Col. Kenneth Hall, who led the 27 SOMDG from Oct 2007 to July 2009. (U.S. Air Force photo by Staff Sgt. Heather R. Redman/RELEASED)