The United Nations has sharply criticized President Donald Trump after his decision to resume U.S. nuclear weapons testing in response to Russia’s recent testing of “doomsday” weapons like the Burevestnik missile. Trump’s announcement—made minutes before meeting China’s Xi Jinping—marked the first planned U.S. nuclear test in 33 years, stunning policymakers worldwide and drawing condemnation from UN officials, who called the move “a step back for humanity” and warned it could unravel decades of global nuclear restraint.