Arliss Sakos (center), chief of the 28th Bomb Wing Protocol Office, reviews the sequence for a change of command during a rehearsal at the Pride Hangar at Ellsworth Air Force Base, S.D., May 1, 2012. The base protocol office plays a vital role in coordinating and overseeing a wide range of activities, ranging from hosting distinguished visitors to promotions, to changes of command and other special events. (U.S. Air Force photo by Airman 1st Class Anania Tekurio/Released)