 Cliff flies to the rendezvous , where Sinclair demands that Cliff give him the rocket pack . Cliff divulges to the mobsters that the actor is a Nazi spy ; Valentine turns his weapon on Sinclair and Lothar . Sinclair summons 60 heavily armed Nazi S.A. commandos hidden at the observatory . The Nazi rigid airship Luxembourg appears overhead to evacuate Sinclair . FBI agents suddenly announce their presence , having secretly surrounded the area ; they and the mobsters join forces to battle the Nazis . Sinclair and Lothar escape , dragging Jenny with them aboard the airship . 
