North Korean leader Kim Jong-un vows 'offensive' nuclear expansion

North Korean leader Kim Jong-un vowed to enhance his nuclear arsenal in more 'practical and offensive' ways as he met with senior military officials to discuss the country's war preparations in the face of his rivals' 'frantic' military exercises, state media said Tuesday. Kim stressed the need to bolster his nuclear deterrent with 'increasing speed on a more practical and offensive' manner, KCNA said.