"Tired Mountain Syndrome" - North Korea's Nuclear Test Site Is Headed For A Deadly Collapse
UN Security Council sanctions aside, one of the reasons China has closed much of its border with North Korea and imposed emergency measures to monitor radiation flowing across the mountainous terrain is because the country’s scientists worry that the mountain under which North Korea has held five of its six nuclear tests is in danger of collapsing and unleashing a devastating cloud of radiation on the surrounding terrain.