Ukraine launched a bold attack on airfields deep inside Russia. It launched 117 drones smuggled in containers, including to eastern Siberia, some 4,000km from Ukraine. It claims to have damaged or destroyed at least 41 Russian planes, including strategic bombers, which are difficult to replace. A few days later Ukraine said it had “severely damaged” Kerch bridge, which links Russia with the Crimean peninsula it occupies, with underwater weapons. America’s president, Donald Trump, said that his Russian counterpart, Vladimir Putin, vowed on a call to retaliate against the drone strike.