Democratic People’s Republic of Korea's (DPRK) leader Kim Jong Un said on Friday Pyongyang will consider the "highest level of hard-line countermeasure in history" against the United States in response to US President Donald Trump's threat to destroy the DPRK. Calling Trump "mentally deranged" and his comments "the most ferocious declaration of a war in history," Kim said his UN speech on Tuesday confirmed Pyongyang's nuclear program has been "the correct path".