The announcement appeared to alarm key US foe Iran, which criticized the directive as 'irresponsible.' UN chief Antonio Guterres said through his deputy spokesman that 'nuclear testing can never be permitted under any circumstances.'

US president references China and Russia in Truth Social post shortly before meeting with President Xi Jinping

"Because of other countries testing programs, I have instructed the Department of War to start testing our Nuclear Weapons on an equal basis. That process will begin immediately,"…

The U.S. has followed a ‘voluntary moratorium’ on nuclear weapons testing since 1992