In the 1960's, I.F. Stone's Weekly was must-reading in Washington, a one-man operation that often scooped the Washington Post and New York Times. The author and publisher had been a popular New York journalist during the Depression, who was effectively blacklisted during the McCarthy Era as an accused Russian spy. D.D. Guttenplan is author of a lengthy new biography, American Radical: The Life and Times of I.F. Stone.