In a chilling nuclear faceoff, U.S. President Donald Trump and Russia’s Security Council Secretary Sergei Shoigu have issued duelling messages that could mark the most dangerous moment in nuclear ...

US officials on Thursday did not clarify whether Trump was calling for testing of nuclear weapon delivery systems or ending a 33-year moratorium on explosion tests, which experts said would be ...

President Donald Trump appeared to suggest the U.S. will resume testing nuclear weapons for the first time in three decades, saying it would be on an “equal basis” with Russia and China. The Kremlin ...