Why North Korea needs the U.S. as an enemy

A North Korean soldier looks at the southern side through a pair of binoculars at the border village of Panmunjom, north of Seoul, Wednesday, Feb. 26, 2003.
AP Photo/Ahn Young-joon
Bill Radke speaks with Seattle-based journalist and author Blaine Harden about the history of North Korea and the tensions between it and the U.S.