South Korean President Lee Myung-bak (2nd R) shakes hands with Turkish Prime Minister Recep Tayyip Erdogan as their wives Emine Erdogan (R) and Kim Yoon-ok (L) stand by before their meeting at the presidential house in Seoul March 26, 2012. South Korea hosts some 50 world leaders at a two-day nuclear security summit starting on Monday. [Photo/Agencies]