Last year a Russian drone punched a hole in the dome that protects the Chernobyl nuclear-power plant. An accident there in 1986 was the world’s worst nuclear disaster, so the Russian attack is the stuff of nightmares. As our story explains, until the damage is repaired there is a risk of a severe leak.

Donald Trump apparently cares more about Iranians’ freedom than Venezuelans’, and has threatened to attack the regime that is cracking down on massive protests against it. But Iran is a harder target than Venezuela was. We analyse America’s military options.