Lieutenant Colonel Greg Vaughan accpets his Crtificate of Retirement from 315th Airlift Wing Mission Support Group Commander Colonel Bill Stephens May 16 at Charleston Air Force Base S.C. Lt. Col. Vaughan had been a member of the Air Force Reserve for 27 years and the 81st APS commander for nearly two years. (U.S. Air Force Photo/2nd Lt Joe Simms)