Walter Cronkite was the man who gave us the news for two tumultuous decades in the late 20th century. As historian, journalist and author David Halberstam says in praise of the great CBS newsman: "Most Americans really learned of the evening news and learned of Vietnam and learned of the civil rights movement and learned of Watergate with Walter Cronkite as the man who ushered it into their homes. And did it with great professionalism over a very long time and was I think absolutely true to himself." In AMERICAN MASTERS Walter Cronkite: Witness to History, a documentary narrated by Katie Couric, historians, fellow journalists and CBS colleagues appraise the career of the man who was called "the most trusted man in America." CBS writer and commentator Andy Rooney, legendary producer/director Don Hewitt, correspondents Mike Wallace, Morley Safer, Lesley Stahl and Barbara Walters, columnists Molly Ivins and Helen Thomas, Senator John McCain and President Jimmy Carter guide the viewer from Cronkite's early days as a foreign correspondent in World War II through his thirty-year career at CBS News.