Kim Jong-un (front row, centre), youngest son of North Korea's leader Kim Jong-il, attends a meeting of the ruling Workers' Party in Pyongyang September 28, 2010, in this video released on September 30, 2010. North Korea's ruling Workers' Party on Tuesday held its biggest meeting in 30 years and appointed the son of leader Kim Jong-il to a senior post, pushing ahead the succession process in the reclusive state.