This episode's headline: Tobacco Concessions; Friendly Persuasion; Dialogue. ANCHOR: JIM LEHRER; GUESTS: CHRISTINE GREGOIRE, Washington State Attorney General; PAUL RAEBURN, Business Week; SAM NUNN, Former Democratic Senator; ROBERT ZOELLICK, Former State Department Counselor; GARY WILLS, Author; CORRESPONDENTS: CHARLAYNE HUNTER-GAULT; CHARLES KRAUSE; MARGARET WARNER; DAVID GERGEN;