North Korean leader Kim Jong Un attends the 5th Plenary Meeting of the 7th Central Committee of the Workers' Party of Korea (WPK) in this undated photo released on December 31, 2019 by North Korean Central News Agency (KCNA). KCNA via REUTERS ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. REUTERS IS UNABLE TO INDEPENDENTLY VERIFY THIS IMAGE. NO THIRD PARTY SALES. SOUTH KOREA OUT. - RC2M6E9TW1D4