When it comes to naval strength, the US is peerless, and that tradition continues with the first rigorous sea test of this state-of-the-art sub.

Seoul is embracing nuclear-powered submarines after a nod from Donald Trump as South Korea tries to keep pace in an emerging arms race with North Korea.

The third and latest version of the M51 has new nuclear warheads as well as improved range, accuracy and capability to penetrate enemy defenses.

South Korea received U.S. approval to build a nuclear-powered attack submarine that can operate for months underwater, track Chinese and North Korean vessels in the Pacific, and guard key shipping lanes with U.

Russia has launched its newest nuclear-powered submarine, the Khabarovsk, a shadowy sea beast designed to carry the Poseidon nuclear drone – the infamous doomsday missile capable of unleashing apocalyptic chaos from the depths of the ocean.

President Donald Trump on Monday took aim at Russia’s announcement that it has tested a nuclear-powered missile that can go more than 8,000 miles, telling President Vladimir Putin that he “ought to get the war ended” instead.