Seoul shows blueprint of North's nuclear test site

South Korea has unveiled what appears to be a blueprint of a tunnel designed for nuclear tests in northeastern North Korea.

The blueprint was visible in a North Korean documentary aired on Korean Central TV in September 2010.

South Korean authorities on Monday released an illustrated photo of the blueprint, saying they believe 2 nuclear tests have been conducted inside the tunnel at the Poongkye-ri nuclear test site.
[link to www3.nhk.or.jp]
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