The de-mining of the border between North and South Korea is being seen as an extraordinary step, but it's likely to take decades before the two countries reunite.
There are about two million land mines along the heavily fortified border.
Korean Foundation Professor and historian Charles Armstrong says it's a level of inter-Korean cooperation, especially at a military level, that we've never seen before.
And he old Kate Hawkesby Koreans on both sides talk about reunification quite a bit.
"It's hard to imagine how these two very different systems could ever be integrated in the near future. So unification is the goal and the Koreans may achieve it, but it will take a long time."
LISTEN ABOVE AS CHARLES ARMSTRONG SPEAKS WITH KATE HAWKESBY
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