President Donald Trump hit back at North Korea leader Kim Jong Un's threats Friday morning, responding to the rogue nation's "madman" leader with a promise that he "will be tested like never before!"
Trump's Friday tweet came after Un lashed out late Thursday, calling Trump "deranged" and a "dotard," saying he will "pay dearly" for threatening to destroy Pyongyang in his speech to the United Nations on Tuesday.
"Dotard" is a translation of a Korean word, "neukdari," which is a derogatory reference to an old person.
Kim said Trump was "unfit to hold the prerogative of supreme command of a country" and "a rogue and a gangster fond of playing with fire."
Kim's foreign minister later said North Korea may test a hydrogen bomb in the Pacific Ocean to fulfill Kim's vow to take the "highest-level" action against the United States.