Since August 2003, negotiations over North Korea's nuclear weapons have involved six governments: the U.S., North Korea, China, South Korea, Japan and Russia. Since the talks began, North Korea has operated nuclear facilities at Yongbyon and apparently has produced weapons-grade plutonium estimated as sufficient for five to eight atomic weapons. U.S. officials have cited evidence that North Korea also operates a secret highly enriched uranium program, which also could produce atomic weapons. This book summarises what is known from open sources about the North Korean nuclear weapons program and assesses current developments in achieving denuclearisation. This book consists of public documents which have been located, gathered, combined, reformatted, and enhanced with a subject index, selectively edited and bound to provide easy access.