North Korea says leader oversaw missile tests made to launch from submarines

This photo provided by the North Korean government shows what it says is a test firing of Pulhwasal-3-31 in North Korea (Korean Central News Agency/Korea News Service/ AP)

North Korean leader Kim Jong Un has supervised test firings of cruise missiles designed to be launched from submarines and reviewed efforts to build a nuclear-powered submarine, state media said on Monday.

Mr Kim reiterated his goal of building a nuclear-armed navy to counter what he portrays as growing external threats.