The Day a U.S. Submarine ‘Sank’ a British Aircraft Carrier Key Points and Summary: In a 2013 joint naval exercise, the U.S.

China's People's Liberation Army Navy could have more than 430 ships and submarines in the next five years, giving it greater confidence at sea.

North Korea has unveiled for the first time what it says is a nuclear-powered submarine under construction, a weapons system that can pose a major security threat to South Korea and the US.