Here is a look at some of the places where the question of national sovereignty is raising tensions:
Dokdo (South Korea); Takeshima (Japan) islands
South Korea controls the islets, which are inhabited by a handful of residents and guarded by a small South Korean police detachment. They are in an area known for rich fishing. South Korean President Lee Myung-bak visited the islets in August, a first by a South Korean leader, inflaming relations with Japan.
Yeonpyeong Island
(North and South Korea)
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