Punggye-ri, a hidden corner in the mountains of Kilju County, in North Korea’s northwest Hamgyong province, is the only active nuclear test site in the world.
But on Thursday North Korea is expected to dramatically close down these secretive facilities, by collapsing or sealing the tunnels leading to the underground testing ground and dismantling research buildings in full view of 30 foreign journalists.
The move is highly symbolic as a confidence-building measure ahead of a June summit in Singapore between Kim Jong-un and Donald Trump, the US president.
But serious questions remain about whether the dismantlement will actually have any tangible impact on Pyongyang’s already well-advanced nuclear…
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