Jang Sung-taek

Jang Song-thaek (January or February 1946 – 12 December 2013) was a North Korean politician. He was married to Kim Kyong-hui, the only daughter of North Korean premier Kim Il Sung and his first wife Kim Jong Suk, and only sister of North Korean general secretary Kim Jong Il. He was the uncle of the current leader of North Korea, Kim Jong Un, by marriage.

The extent of Jang Song-thaek's power and position has not been confirmed in the West. However, in 2008 South Korean government officials and academic North Korea experts suggested that he had de facto leadership over North Korea while Kim Jong Il's health was declining and when Kim subsequently died. Jang was a vice-chairman of the National Defence Commission, a position considered second only to that of the supreme leader. He is believed to have been promoted to four-star general around the time of Kim Jong Il's death in December 2011, as his first appearance in uniform was while visiting Kim lying in state. Jang was considered a "key policy adviser" to Kim Jong Un.