Kim Jong Un unveils a new 8,700-ton nuclear-powered submarine, escalating tensions in the Pacific. Learn how this stealth ...

I’ve grown up with rockets that burn chemical fuel, but NASA’s next big leap in propulsion could make those engines look as dated as steam trains. By turning to nuclear power in space, the agency is ...

Russian propagandists are trumpeting the “successful test” of the Burevestnik missile — a cruise missile with a nuclear-powered engine that supposedly gives it unlimited range. Similar claims of ...

North Korea state media photos showed a largely completed nuclear-powered submarine hull as leader Kim Jong Un condemned ...

The Republic of Korea Navy submarine Na Dae-Yong (SS-069) prepares to moor alongside the Emory S. Land-class submarine tender USS Frank Cable (AS 40) at the ROK Navy base in Jeju-Do, Oct. 11, 2024.

If Tokyo acquires nuclear-powered subs, it would be a significant strategic shift for the only nation to have suffered atomic bombings. In this May 31, 2025 file photo, Japan’s then-Defense Minister ...

Facing Trump’s call for a quick ceasefire and bruising, new U.S. sanctions on Russia’s oil industry, Putin is again reminding the U.S. and other Western allies of Kyiv about his nuclear arsenal to ...

President Vladimir Putin said on Wednesday that Russia had successfully tested a Poseidon nuclear-powered super torpedo that military analysts say is capable of devastating coastal regions by ...

Westinghouse Electric Co. has joined with ownership groups Cameco Corp. and Brookfield Asset Management in a partnership that would advance deployment of nuclear power technology across the U.S. The ...

For decades, Washington blocked Seoul’s desire for the attack submarines over concerns about nuclear proliferation. President Trump reversed that policy last month, but left key questions unresolved.