As the country's biggest political event held every five years, the congress sets policy and can bring changes in leadership roles beneath supreme commander Kim Jong Un. SEOUL: North Korean leader Kim Jong Un began reviewing the country's progress in the past five years that brought "great transformation" during the second day of a key party congress, state media KCNA said on Saturday (Feb 21). North Korea's Ninth Congress of the ruling Workers' Party opened on Thursday and is expected to last