World War II
Nuclear proliferation is the rapid spread of nuclear weapons to nations who are not known to deal with nuclear weapons. There is a fear that with all the spreading countries will get to wrapped up in them and could create a worldwide nuclear war. The first bomb was made from uranium and plutonium in 1945. These first bombs were dropped in Japan's Hiroshima. A treaty was created to delay the spread of nuclear material called the Treaty on the Non-Proliferation of Nuclear Weapons. There are 189 states party to the Nuclear Treaty. India, Pakistan, and North Korea have showed the world they possess nuclear weapons.
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