Why do only a few countries have nuclear weapons

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Transcript

00:00Why do some countries have nuclear weapons while others don't?

00:02Currently, there are nine officially recognized nuclear states,

00:05six of which are in Asia, two in Europe, and only one in North America.

00:08Other countries don't have it because of Nuclear Non-Proliferation Treaty,

00:12which was signed in 1968 to prevent the spread of nuclear weapon.

00:15Only four countries have never signed the NPT, India, Pakistan, Israel, and South Sudan,

00:20three of which have nukes.

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