North Korean leader Kim Jong-un (R) watches a military parade held to celebrate the centenary of the birth of the North's founder Kim Il-sung in Pyongyang on April 15, 2012, in this picture released by the North's KCNA news agency on April 16, 2012. Most North Koreans never heard their late leader, Kim Jong-il, speak. His son, smiling and joking with generals on a podium as he watched a big military parade on Sunday, shattered that mold. In a surprise 20-minute speech, Kim Jong-un, the 20-something leader of one of the world's most isolated countries, displayed few nerves as he praised his grandfather, Kim Il-sung, on the centenary of his birth. REUTERS/KCNA (NORTH KOREA - Tags: POLITICS ANNIVERSARY MILITARY TPX IMAGES OF THE DAY) 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