After the Berlin blockade, the USA and the USSR realised that they were in a competition for world domination. They began to build up their armies and weapons. The Cold War became very serious as both the east and west focused on the development of the Hydrogen Bomb which was 2500 times stronger that the Hiroshima bomb. Also, by the 1950's, US intelligence thought that in a Russian missile attack, 20 million Americans would die and 22 million would be injured. The Americans increased their spending on weapons massively as a result of the Missile Gap - the belief that the Russians were way
