World Lines Tighten As Cold War Builds: Eight Atlantic pact nations sign an agreement that starts a billion dollars worth of arms flowing to Western Europe. The joint chiefs of staff leave for the far east to confer with Genneral Macarthur and survey the military situation, while in New York Dr. Harold Urey, one of America's top atomic scientists tells an audience that we must make the hydrogen bomb. (audio starts at 00:1:05)