This episode's headline: Security Matters; TWA Flight 800 - The Search Continues; Fighting Terrorism; New Leaf; Converging Cultures. ANCHOR: JIM LEHRER; GUESTS: CLIFF VAN ZANDT, Former FBI Agent; JIM NORRIS, San Francisco Police Department; SEN. ORRIN HATCH, Chairman, Judiciary Committee; REP. JOHN CONYERS, [D) Michigan; CORRESPONDENTS: TOM BEARDEN; BETTY ANN BOWSER; KWAME HOLMAN; MARGARET WARNER; LEE HOCHBERG; RICHARD RODRIGUEZ;
