A nuclear arm is a weapon which explodes by nuclear fission or fusion. It is also also known as an atomic bomb.
Atomic bomb is a fission type weapon, which was used to attack Japanese cities Nagasaki and Hiroshima. On the other, hydrogen bomb is a fusion type bomb.
Today, 7 countries have nuclear arms: USA, Russia, United Kingdom, France, China – these countries were WW II allies. India and Pakistan also have it. In addition, North Korea , Israel and Iran may have it.
Nuclear arms are very powerful and dangerous weapons. And the risk of nuclear war increases as weapon are developed.
So, we should reduce the number of nuclear arms.
by Shin Moriyasu
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