For decades, Walter Cronkite was known as "the most trusted man in America." Millions across the nation welcomed him into their homes, first as a print reporter for the United Press on the front lines of World War II, and later, in the emerging medium of television, as a host of numerous documentary programs and as anchor of the CBS Evening News from 1962 until his retirement in 1981. Yet this very public figure was a remarkably private man. Few know...