The first appearance of Nuclear bomb in public was the America put the new destructive weapon in Hiroshima and Nagasaki of Japan in 1945, which was end of the world war II .At first, the skills of this awful bomb were only controlled by the United States. In 1949, the Soviet Union who used to be its ally of the World War II and later became the competitors for their personal benefits developed the Nuclear bomb. From then on, the competition of maintain the superiority of nuclear weapons began. There were lots of nuclear weapons testing including above-ground and below-ground explosion for the arms race happened, which gave off a mass of nuclear fallout. With the development of competition, it was necessary to promote development and popularization of civil defense procedures, which shown in two aspects.
The nuclear weapon is a kind of very dreadful weapon which has huge destructive power. At the same time, after the explosion of the nuclear bomb, there will be lots of influence on local people and this influence will last a long time. So, we should control it and prevent its extension.
