1999: Inspectors Visit Alleged Site of North Korean Enrichment Plant, Find Only Caverns

Following an agreement with the US government, North Korea allows inspectors to visit the alleged site of its uranium enrichment facility, a series of caves near the town of Kumch’ang-ni, 100 miles north of Pyongyang, and thirty miles northwest of North Korea’s nuclear reactor at Yongbyon-kun. However, the inspectors only find hollowed-out caverns. The intelligence on which the inspection was based was provided by North Korean defector Hwang Jang-yop. [Levy and Scott-Clark, 2007, pp. 281]