Every year, film fans and studio executives travel to Park City, Utah for the Sundance Film Festival, a premiere showcase for independent films from around the world.
While feature films are always a draw at the festival, documentary fans closely follow the nonfiction films that premiere at Sundance each year.
Sundance Institute founder Robert Redford joins NPR's Neal Conan with a preview of the documentaries on view at the 2012 festival, and weighs in on the role nonfiction films play in furthering social change.
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