“The Sixties at 50,” an exhibition of video, photos and other treasures from one of society’s most significant decades, is on display at the Vanderbilt University Central Library and Special Collections. The exhibition was curated by a team of Vanderbilt subject librarians and technology staff under the guidance of Celia Walker, director of special projects. “The Sixties at 50” is free and open to the public through May 15, 2011.