This episode's headline: Deadly Tremors; School for Success; Mad Cow; The Early Stories. ANCHOR: JIM LEHRER; GUESTS:GEORGE GRAY; DENNIS LAYCRAFT; JOHN UPDIKE; CORRESPONDENTS: KWAME HOLMAN; RAY SUAREZ; SPENCER MICHELS; MARGARET WARNER; GWEN IFILL; TERENCE SMITH; KWAME HOLMAN