The United States and its allies are trying to gauge how, exactly, Vladimir Putin might use the nuclear weapons he’s threatened to deploy in his war in Ukraine, if he were to take that dire step. Meanwhile, North Korea has conducted six missile tests in two weeks.
Emily Tamkin in Washington DC, Katie Stallard in Scotland’s Black Isle, and Ido Vock in Helsinki discuss what Russia’s use of a nuclear weapon could involve, and how Ukraine, the US and their allies might respond.