North Korean leader Kim Jong Un said his country is developing new weaponry including a nuclear-powered submarine, tactical nuclear weapons and advanced warheads designed to penetrate missile defense systems.
원문출처 : https://www.cnn.com/2021/01/09/asia/north-korea-nuclear-development-intl-hnk/index.html
원문출처 : https://www.cnn.com/2021/01/09/asia/north-korea-nuclear-development-intl-hnk/index.html