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The size of the atomic bombs is calculate with the power of the dynamite TNT, it is indicate in kilotons and megatons. An atomic bomb with the marking 1 kiloton, so it has the energy of 1000 tons TNT. An atomic bomb with the marking 1 megaton, so it has the energy of 1 million tons TNT.
The atomic bombs, witch the Americans dropped over Hiroshima and Nagasaki were a 12 kilotons and a 22 kilotons atomic bombs. Even this bombs killed some hundred thousand people and destroyed two cities. But today atomic bombs with this size are small atomic bombs, because today the biggest atomic bomb is a 20 megatons bomb. This bomb has the some size like 1500 Hiroshima-bombs, or 750 Nagasaki-bombs.
By the detonation of a 20 megatons atomic bomb, the head wave take 20 seconds, and even the people in the distance of 45 kilometres get second- degree burns. The shock wave destroy all the buildings within a radius of 20 kilometres. With a 20 megatons atomic bomb is it possible to kill some millions people in one go.
The nations with atomic weapons
Today it\'s clear that Russia, the United States, Great Britain, China, France and India have the atomic weapons. But it\'s possible that Israel, South Africa, Pakistan and another nations have the atomic weapons. With the non-proliferation treaty want the atomic nation to stop the spread of atomic weapons.
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