This episode's headline: Exxon Cleanup; HUD Scandal; Football Lottery; New President. The guests include PATRICK O'MEARA, Indiana University; DUMISANI KUMALO, American African Committee; HERMAN NICKEL, Former U.S. Ambassador to South Africa; CORRESPONDENTS: LEE HOCHBERG; KWAME HOLMAN; JOHN TUTTLE. Byline: In Washington: JAMES LEHRER; In New York: ROBERT MacNeil