How North Korea could wipe out electrical networks across the US with a high-altitude EMP blast
North Korea's latest nuclear weapons test has renewed fears of a devastating electro-magnetic pulse, or EMP, attack that could wipe out electrical grids across the US.
For the first time, North Korea specifically mentioned the possibility of an EMP attack on the US following Sunday's test of a 100-kiloton weapon, which the regime claims is a thermonuclear bomb.
The weapon could wipe out much of a city, but the pulse from a high-altitude blast could sow chaos and destruction far wider.
North Korea's state news agency warned that the weapon 'is a multifunctional thermonuclear nuke with great destructive power which can be detonated even at high altitudes for super-powerful EMP attack.'