at mount rushmore, thornhill talks with vandamm to have kendall arrested. kendall shoots thornhill with blanks and runs away. the professor has kendall and thornhill meet. thornhill learns she must go on an airplane with vandamm. the professor locks thornhill in a hospital room. thornhill escapes and goes to vandamm's house. vandamm discovers that kendall is a spy, used blanks and that the sculpture has microfilmss. vandamm says he will throw kendall off the plane. thornhill warns kendall with a note. the two escape and end up at the monuments of mount rushmore. vandamm's men fall from the monuments. the professor arrests vandamm.