This probably isn't something to get too nervous about, but it does make you scratch your head: Why all this hostility from a country that's so far away?
Former congressman and Libertarian presidential candidate Ron Paul said recently, "...one reason North Korea is isolated is the isolationist policies of the US government. It is isolationist to impose sanctions, to prohibit Americans from doing business, to impede or forbid travel by US citizens to countries with which the US government disagrees. North Korea is isolated in part because our government has isolated it."
Ron Paul is right. Let's get the U.S. military out of South Korea, and let's start allowing Americans to interact with Koreans, whichever side of the DMZ they live on. That's what Libertarian officeholders would do.