North Korean leader Kim Jong-un on Tuesday doubled down on Pyongyang's nuclear weapons buildup and confrontational stance toward Seoul. Experts believe the move

Kim Jong Un cited efforts by Washington and Seoul to push forward with South Korea's possession of a nuclear submarine as one justification for the buildup.

Kim Jong Un vowed to beef up North Korea's defence capabilities, citing military modernisation efforts by South Korea and the United States pushing the region "to the brink of a…