North Korean children perform at the Pyongyang Students and Children's Palace on April 22, 2012, to celebrate the centenary of the birth of North Korean founder Kim Il-Sung, in this picture released by the North's KCNA news agency in Pyongyang April 23, 2012. REUTERS/KCNA (NORTH KOREA - Tags: POLITICS ANNIVERSARY SOCIETY) QUALITY FROM SOURCE. THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS. NO THIRD PARTY SALES. NOT FOR USE BY REUTERS THIRD PARTY DISTRIBUTORS