North Korea Says It Has Launched a Nuclear Attack Submarine

SEOUL, SOUTH KOREA - North Korea said Friday it has launched what it said was a nuclear attack submarine it has been developing for years, a step leader Kim Jong Un described as crucial in his efforts to build a nuclear-armed navy to counter the United States and its Asian allies.

The North's official Korean Central News Agency said the vessel - named 'Hero Kim Kun Ok' - is designed to launch tactical nuclear wea