This episode's headline: Disarming Agreement; Summing Up; There She Is---. The guests include In Washington: ROZANNE RIDGWAY, Asst. Secretary of State; In New York: WILLIAM BUCKLEY, National Review; ANTHONY LEWIS, New York Times; REPORTS FROM NEWSHOUR CORRESPONDENTS: MOLLIE IVANS. Byline: In New York: ROBERT MACNEIL, Executive Editor; In Washington: JUDY WOODRUFF, Chief Washington Corresondent