After the catastrophic destruction caused by nuclear weapons at the end of World War II, most of the world's countries signed onto an agreement called the Treaty on the Non-Proliferation of Nuclear Weapons, which aims to prevent the spread of weapons of mass destruction. With nuclear weapons at the centre of the conflict between Israel and Iran, the agreement is back in focus… So, in this Squiz Shortcut, we’ll look at what it is, who is and isn’t signed onto it, and how it works.

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Reading: If you want to read more about how the US strikes on Iran’s nuclear sites went down, this ABC explainer gives a good insight into the inner workings of the operation.

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