States of emergency: Nigeria

Criminal gangs in north-western states, jihadists in the north-east, a rebellion in the south-east: kidnappers, warlords and cattle rustlers are making the country ungovernable. The new head of Samsung Electronics has a legacy to build—and aims to do so by breaking into the cut-throat business of processor chips. And the sci-fi classic “Dune” gets a good cinematic treatment at last.

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