North Korea leader's uncle executed

This undated picture released from North Korea's official Korean Central news Agency on November 27, 2012 shows North Korean leader Kim Jong-Un (C) during a photo session with participants in the national meeting of chiefs of branch social security stations at an undisclosed location in North Korea.  AFP PHOTO / KCNA via KNS ---EDITORS NOTE--- RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / KCNA VIA KNS" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS        (Photo credit should read KCNA VIA KNS/AFP/Getty Images)

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    North Korea leader's uncle executed

CNN's Barbara Starr reveals what the execution of Kim Jong Un's uncle for treason means for U.S. national security.