This undated image grab taken from footage shown by North Korea's KCTV and released by South Korea's Yonhap news agency on December 9, 2013, shows Jang Song-Thaek (C) reportedly being dragged out from his chair by two police officials during a meeting in Pyongyang. North Korea confirmed on December 9 that the powerful uncle of young leader Kim Jong-Un has been purged, with state TV airing humiliating images of Jang Song-Thaek being dragged away by uniformed officers.  REPUBLIC OF KOREA OUT  NO ARCHIVES  NO INTERNET    RESTRICTED TO SUBSCRIPTION USE     AFP PHOTO/YONHAPYONHAP/AFP/Getty Images
This undated image grab taken from footage shown by North Korea's KCTV and released by South Korea's Yonhap news agency on December 9, 2013, shows Jang Song-Thaek (C) reportedly being dragged out from his chair by two police officials during a meeting in Pyongyang. North Korea confirmed on December 9 that the powerful uncle of young leader Kim Jong-Un has been purged, with state TV airing humiliating images of Jang Song-Thaek being dragged away by uniformed officers.  REPUBLIC OF KOREA OUT  NO ARCHIVES  NO INTERNET    RESTRICTED TO SUBSCRIPTION USE     AFP PHOTO/YONHAPYONHAP/AFP/Getty Images

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Author Gordon Chang explains the complicated dynamic in North Korea executing Kim Jong Un's uncle, Jang Song Thaek.

Chang: Regime like Richard III with nukes

Author Gordon Chang explains the complicated dynamic in North Korea executing Kim Jong Un's uncle, Jang Song Thaek.