This episode's headline: It's a Wrap; GM Powertrain - Broken Promises?; Under Scrutiny. The guests include MARY CHEH, George Washington Law School; CHARLES FRIED, Harvard Law School; HAJ GHAZ KHANKAN, National Council on Islamic Affairs; FOUAD AJAMI, Middle East Analyst; JUDITH MILLER, New York Times; GRAHAM FULLER, Political Scientist, Hand Corp.; PEG TYRE, New York Newsday; CORRESPONDENT: FRED DE SAM LAZARO. Byline: In New York: ROBERT MacNeil; In Washington: ROGER MUDD