McAlister retires
U.S. Air Force Maj. Justin L. Kunath, senior duty officer, 624th Operations Center, presents a retirement certificate to Master Sgt. Robert D. McAlister during a ceremony held at Barksdale Air Force Base, La., Dec. 7, 2013. McAlister retired after more than 28 years of military service. (U.S. Air Force photo by Master Sgt. Jeff Walston)