This episode's headline: News Maker; News Maker; Making A Case; Gergen & Shields. The guests include TARIQ AZIZ, Foreign Minister, Iraq; ROBERT GATES, Deputy National Security Adviser; DAVID GERGEN, U.S. News & World Report; MARK SHIELDS, Washington Post; CORRESPONDENTS: CHARLAYNE HUNTER- GAULT; ROGER MUDD. Byline: In New York: ROBERT MacNeil; In Washington: JAMES LEHRER