Most did their own independent development.
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Russia, United Kingdom, France, China, India and others have nuclear weapons in their arsenal. Which are the countries that have them actually deployed and ready to use is in doubt.
Many countries have nuclear weapons today including the United States. China, North Korea, South Korea, and Japan also have nuclear weapons.
the first five countries that were involved in nuclear weapons are as follows;United StatesGermanyGreat BritainRussiaArgentina
RussiaUS
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A war where countries fight each other with nuclear weapons.
there are 14 countries which are licensed to make nuclear weapons 5 veto countries and other are developing nations
Proliferation of nuclear weapons refers to the spread of nuclear weapons amongst different countries. First the U.S. had a nuclear bomb; then the Soviet Union had a nuclear bomb, followed by other countries such as the United Kingdom, France, China, India, and so on.
NO. Afghanistan does not have nuclear weapons, nor did it have nuclear weapons at any time, nor has it been accused by other countries of having nuclear weapons. Afghanistan is also a signatory to the Nuclear Non-Proliferation Treaty, for what that's worth.
I know of no "nuclear biological" weapons, perhaps you meant nuclear, biological, chemical (NBC) weapons, which can be any one of these.
Pakistan has about 100 nuclear weapons.
to protect yourself and threaten other countries
Russia, United Kingdom, France, China, India and others have nuclear weapons in their arsenal. Which are the countries that have them actually deployed and ready to use is in doubt.
No in modern day society only the UN can authorize the forced halt on nuclear weapons by sanctions or by a joint strike
Many countries have nuclear weapons today including the United States. China, North Korea, South Korea, and Japan also have nuclear weapons.
Only nine countries have confirmed nuclear weapons: United States, Russia (and several former USSR countries), United Kingdom, France, China, India, Pakistan, North Korea, and Israel. All of these have conducted known nuclear tests except for Israel. All other countries of the world do not have known nuclear weapons. To see a breakdown of how many weapons each of these countries is believed to have, see the "related links" below.