The Yongdok-tong Nuclear High Explosive Test Facility is the only known operating facility in the country for testing designs and components for high-explosive detonation of nuclear weapons. This is the most comprehensive report of this secret facility currently available at the unclassified level.| Beyond Parallel
Satellite image of the Punggye-ri Nuclear Testing Facility acquired on October 4, 2024, a few days before the rapid escalation of tension in the peninsula, shows that the facility continues to be well maintained.| Beyond Parallel
The first open-source analysis of declassified satellite imagery suggests that the construction of North Korea's Punggye-ri Nuclear Testing Facility started as early as 1985 to 1986.| Beyond Parallel