This episode's headline: Arming Iran?; Preparing for a War; Rebuke from Rome; Better Batter. The guests include In Washington: Sir ANTONY ACLAND, British Ambassador; CLOVIS MAKSOUD, Arab League; WILLIAM QUANDT, Brookings Institution; SHAUL BAKHASH, George Mason University; In New York: KENNETH BRIGGS, Journalist; REPORTS FROM NEWSHOUR CORRESPONDENTS: JOHN SIMPSON (BBC), in London; CRAIG THOMPSON (Visnews), in Philippines; CHARLES KRAUSE, in Nicaragua; PENNY STALLINGS. Byline: In New York: ROBERT MacNEIL, Executive Editor; CHARLAYNE HUNTER-GAULT, Correspondent; In Washington: JUDY WOODRUFF, Correspondent