Trump's war of words with North Korea
President Trump is known for his fiery, distinctive voice on Twitter, but he might have met his match. North Korea's state-run media arm, the Korean Central News Agency, often issues flamboyant threats to the United States.
Why it matters: The leaders of two nuclear-armed nations are engaged in a rhetorical game of chicken. While it has largely been limited to simple name-calling (think: Trump's nickname of "Rocket Man" for Kim), the childish aspects of their words risk spilling over into bona fide geopolitical and nuclear catastrophe.