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The Wall Street Journal: North Korea state news agency references ‘EMP’ — a weapons tactic with potential to shut down U.S. electrical grid

North Korea’s threats against the U.S. now include a tactic long discussed by some experts: an electromagnetic pulse, or EMP, triggered by a nuclear weapon that would aim to shut down the U.S. electricity grid.

North Korea’s state news agency made a rare reference to the tactic in a Sunday morning release in which the country said it was able to load a hydrogen bomb onto a long-range missile. The bomb, North Korea said, “is a multifunctional thermonuclear nuke with great destructive power which can be detonated even at high altitudes for super-powerful EMP attack.”

The idea of an EMP attack is to detonate a nuclear weapon tens or hundreds of miles above Earth with the aim of knocking out power in much of the U.S.

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