(L-R) Singapore's Prime Minister Lee Hsien Loong, Thai Prime Minister Abhisit Vejjajiva, South Korean President Lee Myung-Bak, Vietnamese Prime Minister Nguyen Tan Dung, Brunei's Sultan Hassanal Bolkiah and Cambodian Prime Minister Hun Sen pose during a photo session before the Korea-ASEAN Commemorative Summit at Seogwipo on the southern resort island of Jeju June 1, 2009. South Korea vowed on Monday to boost ties with its Southeast Asian neighbours to jointly fend off a larger threat to their export-driven economies from growing trade protectionism in Western economies. REUTERS/Jung Yeon-Je/Pool (SOUTH KOREA POLITICS)