World

Concerns Growing Over North Korea's Nuclear Program

Robert Siegel talks to Joshua Pollack, a consultant to the US government, about concerns that North Korea has or could soon have the tools to make the centrifuges to enrich the uranium to make the atomic weapons without having to import key elements in the process. Pollack studies arms control, proliferation, deterrence, intelligence, and regional security affairs. He also writes for the blog Arms Control Wonk.