Editorial Board

North Korea's Nuclear Mistake

Kim Jong Un thinks building a nuclear arsenal is worth it. The world can show him he's wrong.

Hydrogen-powered?

Photographer: Ed Jones/AFP/Getty Images

North Korea's fourth nuclear test is an abrupt reminder that for Kim Jong Un, the costs of developing an atomic arsenal don't yet outweigh its benefits. Fortunately, the rest of the world has never been in a better position to show him that his math is incorrect.

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