Bob Liebman, Ellsworth Heritage Foundation board member and volunteer, provides opening remarks during Heritage Day at the South Dakota Air and Space Museum in Box Elder, S.D., May 19, 2012. A variety of displays and special demonstrations provided by a variety of agencies, including the 28th Security Forces Squadron military working dog section and the 28th Civil Engineer Squadron Explosives Ordnance Disposal team. (U.S. Air Force photo by Airman 1st Class Anania Tekurio/Released)