Lt. Col. Charles Drouillard relinquished his position as commander of the 81st Aerial Port Squadron here to Col. William Stephens during a change of command ceremony May 19, 2012. Colonel Drouillard’s retirement closed out 25 years of distinguished military service in the U.S. Air Force. Colonel Stephens is the commander of the 315th Mission Support Group at Joint Base Charleston, S.C. (U.S. Air Force Photo/Staff Sgt. Shane Ellis)