Comes as Ukrainian army chief says troops battling 'multi-thousand' enemy forces in key frontline town of Pokrovsk ...

The clash between the nuclear-armed neighbors surprised many in military circles and sparked debate over the superiority of ...

Russia has unveiled its long-delayed nuclear-powered submarine Khabarovsk, the first vessel built to carry the Poseidon ...

President Trump announced the U.S. will share nuclear submarine technology with South Korea, which will build its submarines ...