This episode's headline: Trade Tremor; Culture Clash; Update - KGB. The guests include OLEG KALUGIN, Former KGB General; CARLA HILLS, U.S. Trade Representative; REP. RICHARD GEPHARDT, Majority Leader; JAGDISH BHAGWATI, Economist; CLYDE PRESTOWITZ, Former Trade Negotiator; CORRESPONDENTS: ROGER MUDD; CHARLES KRAUSE; PAUL SOLMAN. Byline: In New York: ROBERT MacNeil; In Washington: JAMES LEHRER