This episode's headline: Ready Or Not?; Cuba Revisited; Olympic Efforts Political Wrap. ANCHOR: JIM LEHRER; GUESTS: MIKE BARNICLE, Boston Globe; LEE CULLUM, Dallas Morning News: Robert Kittle, San Diego Union Tribune; PATRICK McGuigan, Daily Oklahoman; CYNTHIA TUCKER, Atlanta Constitution; PAUL WYLIE, 1992 Silver Medalist, Skating; CINDY NELSON, 1980 Silver Medalist, Skiing; MICHAEL ERUZIONE, 1980 Gold Medalist, Hockey; DICK BUTTON, 1948 and 1952 Gold Metal, Skating; CORRESPONDENTS: MARGARET WARNER; CHARLES KRAUSE; ELIZABETH FARNSWORTH