Most people have noticed that world maps include both north and south when it comes to Korea. It wasn't always that way, though. There used to a single, united Korea, and the elderly still may have faint memories of it. In 1945, The Democratic People’s Republic of Korea came into existence. That's North Korea, and any hopes for a reunion were thwarted by nukes in recent decades. You can't force the Kims that have ruled it to cooperate. They could blow up all of us, any time!
With so much time and so much isolation, the Korea of the past truly no longer exists. If the walls ever come down, how will the pieces ever be put back together again?