DefenceTalkRecent satellite imagery suggests North Korea has stepped up excavation work at its main nuclear test site, but there are no signs of an imminent test, a US think-tank said Friday. The images indicate a “significant acceleration in excavation activity” at the remote Punggye-ri test site in the northeast, said the closely-followed 38 North website […]https://www.defencetalk.com/excavation-at-north-korea-nuclear-test-site-us-think-tank-58787/