President Donald Trump has appeared to suggest on social media that the U.S. resume testing nuclear weapons for the first ...

The president’s ambiguity on nuclear testing is worrisome not only because America’s public can’t know what he means, but ...

Russian President Vladimir Putin announced at a meeting with service members on Wednesday that Russia had carried out a successful test of the Poseidon nuclear-powered unmanned underwater vehicle ...

Video. Three days after announcing a test of the nuclear-powered Burevestnik missile, Moscow said on Wednesday it also tested ...