US Korea Institute

Wednesday April 26th 2017
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North Korea’s Punggye-ri Nuclear Test Site: Analysis Reveals Its Potential for Additional Testing with Significantly Higher Yields

Figure 3. Coincident with, or shortly after, radionuclides were detected and traced back to the February 2013 test, a new tunnel began to be excavated from the same point as the previous tunnel at the North Portal.
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Credit for photo of young North Korean girl: T.M. All rights reserved, used with permission.