Putin Says He Could Put Tactical Nuclear Weapons in Belarus by Summer

President Vladimir V. Putin of Russia said he would be able to position nuclear weapons in Belarus by the summer, a claim that analysts said was likely bluster but which underscored the Kremlin's determination to use its vast nuclear arsenal to pressure the West to back down from its support of Ukraine. Western officials condemned Mr. Putin's remarks as irresponsible, even as they said that they saw no indication that Russia was making changes...