Moon, the submarine expert, said that North Korea may have received Russian technological assistance to build a nuclear ...

Only six countries possess nuclear submarines – the USA, Russia, the UK, France, China and India. The vessel is believed to weigh 7,000-ton, and may have been built with the help of ally Russia ...

In 2023, North Korea said it had launched what it called its first “tactical nuclear attack submarine,” but foreign experts doubted the North’s announcement and speculated it was likely a ...