Add Yahoo as a preferred source to see more of our stories on Google. North Korean leader Kim Jong Un visits the construction site of an 8,700-ton nuclear-powered submarine capable of launching ...

SEOUL, South Korea (AP) — North Korea on Thursday displayed apparent progress in the construction of a nuclear-powered submarine, with state media photos showing a largely completed hull, as leader ...

China's navy is moving toward all-nuclear submarine construction, the US Navy's intelligence lead said, describing a long-term shift in how Beijing builds its undersea force as it expands its capacity ...

HII has signed a contract with Babcock International Group to build assemblies for Virginia-class submarines, like the one shown here under construction at HII's Newport News Shipbuilding.