315th Airlift Wing Commander, Col. Gregory Gilmour presents a Meritorious Service Medical certificate to departing 315th Maintenance Group Commander, Col. Richard Gay. Nov. 6. Members of the 315th Maintenance Group welcomed the new commander to their unit during a change of command ceremony at Joint Base Charleston, South Carolina. Col. Richard Gay relinquished his command of seven years to Col. Sharon Johnson as Gay prepares for his retirement later in the year. (U.S. Air Force Photo by Senior Airman Jonathan Lane)