THERE is no shame in enjoying dystopian science fiction - it helps us contemplate the ways in which civilisation might fail. But it is dangerous to take the genre's allegorical warnings literally, as too many people do when talk turns to a possible electromagnetic pulse (EMP) attack. There have been repeated recent claims that North Korea could use a nuclear bomb in space to produce an EMP to ruin US infrastructure and cause societal collapse. This is silly.
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