It was forty years ago this coming week that several hundred thousand young people got together to make music - and ended up making history. You may think you know all there is to know about the Woodstock festival, but NBC's Ann Curry brings you the stories you haven't heard. Woodstock from the ground up, told through the eyes of those who lived it - in the crowd, behind the stage, or on it. We'll also have home movies, personal photographs, and rare film of the festival never before made public. It was three days of music - and more than a little madness - that rocked the world.
Watch "Back to Woodstock" at 7 p.m. ET, 6 p.m. CT on Dateline Sunday.