President Barack Obama called China's President Hu Jintao early this morning in the hopes that he could enlist the leader's help in sending a "clear message" to North Korea. In the weeks since North Korea launched a barrage of shells against South Korea last month, U.S. officials have charged that China isn't putting enough pressure on their neighbor to be less of a threat in the region. The dynamic between China, Japan, the U.S., and South and North Korea may be changing ? but how? For more on this topic we're joined by Brian Myers, researcher of North Korean ideology and propaganda at Dongseo University in Pusan, South Korea.

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