This episode's headline: Legal Briefing; Marching for Democracy; Plymouth's Plantation; Take Heart; Conversation. The guests include NINA TOTENBERG, National Public Radio; DR. VIRGIL BROWN, American Heart Association; JOHN CADY, National Food Processors Assoc.; CALVIN TRILLIN, Author; CORRESPONDENTS: NIK GOWING; PAUL SOLMAN; JUDY WOODRUFF. Byline: In New York: ROBERT MacNeil