This episode's headline: New Troubles; Managed Care; Online Publishing; Ad War on Drugs. ANCHOR: JIM LEHRER; GUESTS: BILL GRADISON, Health Insurance Association of America;RON POLLACK, Families USA; PAUL ARTHUR, University of Ulster; JAMES MATES, Independent Television News; SUSAN DENTZER; CORRESPONDENTS: KWAME HOLMAN; PHIL PONCE;ROD MINOTT; MARGARET WARNER