News that North Korea's  Kim Jong Un announced during a New Year's Day address that his military is on the brink of testing its first intercontinental ballistic missile capable of carrying a nuke elicited a response from President-elect Donald Trump.

As might be expected, Trump felt compelled on to comment on Twitter, of course.

While U.S. officials are skeptical of Kim's boasts -- that often exhibit the same narcissistic and self-congratulatory tendencies of the president-elect -- followers of Trump on Twitter worried that his saber-rattling on social media is both unpresidential and dangerous when aimed at the immature North Korean leader.

Trump's tweets and responses below: