Tension Increases Tension along the Berlin Wall between East and West Berlin increases dangerously as East German soldiers reinforce the barricade through which more and more desperate people are escaping from the Soviet sector into Free West Berlin. Rack focus from barbed wire fence to guards on patrol. Sign reads HALT MINEN - with danger skull images. Mine fields. Soldiers look through binoculars. German officials and soldiers put barbed wire and fence posts into place at Berlin Wall.