North Korea’s Nuclear Tests: A Persistent, Deliberate Process

North Korea continues to develop an arsenal of nuclear weapons despite the concerns and condemnations from neighboring countries and Western powers. Scientific reports about this week’s blast suggest that the bombs could be growing more sophisticated and dangerous. Richard C. Bush, director of the Center for Northeast Asian Policy Studies and Jonathan Pollack, director of the John L. Thornton China Center, take a closer look at North Korea’s nuclear program and the message it sends.