Jeanne Stoltenburg, 28th Force Support Squadron Holbrook Library director, evaluates a book while sorting through titles seldom checked out in the library at Ellsworth Air Force Base, S.D., July 30, 2013. The library’s inventory must be downsized periodically to make room for more popular material. (U.S. Air Force photo by Airman 1st Class Ashley J. Thum/Released)