North Korea releases images of development of nuclear-powered submarine

North Korea showed off its apparent progress in the development of a nuclear-powered submarine. State media released photos of North Korean dictator Kim Jong Un and his daughter, a potential heir, as they inspected what appears to be a largely completed hull.

The Korean Central News Agency (KCNA), North Korea's official state media, said Kim and his daughter visited the shipyard to examine the construction of what it describes as an 8,700-ton-class nuclear-propelled submarine, The Associated Press reported.