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Speed Data: just how big is the world’s nuclear arsenal in 2017?

Visualising who's got them, how many, and how big

By Mark Fitzpatrick   October 2017

Licensed, unlicensed and surrendered bombs

North Korea’s stand-off with Donald Trump is a stark reminder of the weapons that could wipe us all out. The map shows that the official nuclear powers have had some success in containing the geographical spread of atomic weapons since 1945. But during the first half of the nuclear era, bombs got much more numerous—and much more destructive. The largest “Tsar” bomb, which the Soviets tested in the 1960s, had a payload equivalent to 50Mt of TNT, making it over 3,000 times more powerful than the…

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