TOKYO -- Subways in Ukraine's capital of Kyiv stopped operations following the launch of attacks by Russian troops. Stations, as deep as 105 meters underground, became temporary bomb shelters as citizens brought in blankets and tents to protect themselves from Russia's threat of nuclear attack.
Ukrainian President Volodymyr Zelenskyy said in an interview with CNN that "all of the countries of the world" should be prepared for the possibility that Russian President Vladimir Putin could use nuclear weapons in his war on Ukraine.
