North Korea remains a puzzle to Americans. How did this country—one of the most isolated in the world and in the policy cross hairs of every U.S. administration during the past 30 years—progress from zero nuclear weapons in 2001 to a threatening arsenal of perhaps 50 such weapons in 2021?

Hinge Points brings readers literally inside the North Korean nuclear program, joining Siegfried Hecker to see what he saw and hear what he heard in his visits to North Korea from 2004 to 2010. Hecker goes beyond the technical details—described in plain English from his on-the-ground experience at the North's nuclear center at Yongbyon—to put the nuclear program exactly where it belongs, in the context of decades of fateful foreign policy decisions in Pyongyang and Washington.

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