North Korea said Sunday it had tested a hydrogen bomb which it can mount on a missile, declaring "perfect success" in its biggest-ever nuclear detonation. Pyongyang has long sought the means to ...

The Navy is racing to field a new generation of ballistic missile submarines that will eventually rank as the 12 largest ...

A new tool shows the catastrophic impact of a nuclear strike as Russia deploys its “unstoppable” Oreshnik missile, putting ...

Japan is moving closer to bringing the world’s largest nuclear power station back online, a decision that would reshape its energy mix more than a decade after the Fukushima disaster. The planned ...