This episode's headline: Kids Who Kill; Globaphobia; HDTV - Transforming TV; Missing Persons. ANCHOR: ELIZABETH FARNSWORTH; GUESTS: LAWRENCE STEINBERG, Psychologist; LINDA COLLIER, Attorney; STEVE DRIZIN, Attorney; JAMES BACKSTROM, Dakota County Attorney, Minnesota; JOEL BRINKLEY, New York Times; CORRESPONDENTS: SPENCER MICHELS; MARGARET WARNER; KWAME HOLMAN; PHIL PONCE; PAUL SOLMAN; ROGER ROSENBLATT