This episode's headline: Top Guns; Tough Road Ahead; North Korea Famine; Foreign Correspondence. ANCHOR: JIM LEHRER; GUESTS: JOHN BYRNE, Business Week; MICHAEL USEEM, Wharton School; REP. TONY HALL, [D] Ohio; MICHAEL ZIELENZIGER, San Jose Mercury News; CORRESPONDENTS: BETTY ANN BOWSER; PHIL PONCE; MARGARET WARNER; TOM BEARDEN; KWAME HOLMAN;