If and when North Korea's Kumgangsan (Diamond Mountain) resort opens again for foreign visitors, you can actually move through the most heavily fortified border to a scene of spectacular beauty.
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Korea and Japan have spiraled into their worst relations in decades over tensions surrounding a few rocky islets in the ocean between them.
Despite the tininess of East Asia's contested islets, the ways in which the disputes over them play out between Japan and China will serve as a bellwether for how peaceful the region will be as this century progresses.
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