North Korea on Thursday released new images of what it claims is its first nuclear-powered submarine, a massive vessel equal ...

Once USS Barb reaches operational capacity with the Navy, the fast-attack sub will undoubtedly play a role in its sea power.

Seoul wants to join the undersea naval elite – and has received the blessing of US President Donald Trump to do just that.

The US wants South Korea to eventually deploy its newly approved nuclear-powered submarines to help counter China’s rapidly expanding fleet, calling it a responsibility expected of a key ally, ...