Forty years ago Monday, civil rights workers James Cheney, Andrew Goodman and Michael Schwerner disappeared in Mississippi. They were brutally beaten and shot. Cheney, Goodman and Schwerner were three of about a thousand young Americans, black and white, who came together in Mississippi for a peaceful assault on racism. It came to be known as Freedom Summer, one of the most remarkable chapters in the Civil Rights Movement. In this American RadioWorks documentary, correspondent John Biewen brings us the voices of those who fought for democracy that Freedom Summer.