Philippine President Gloria Macapagal Arroyo (L), Singapore's Prime Minister Lee Hsien Loong (2nd L) and Vietnam's Prime Minister Nguyen Tan Dung (R) applaud while Thailand's Prime Minister Abhisit Vejjajiva and South Korea's President Lee Myung-bak (2nd R) exchange documents at the signing agreement ceremony during the ASEAN-Korea Commemorative Summit in Seogwipo on Jeju island June 2, 2009. South Korea and the 10-member Association of Southeast Asian Nations (ASEAN) on Tuesday signed an agreement to boost investment in each other, which they said completed their broader free trade pact. REUTERS/Kim Kyung-Hoon (SOUTH KOREA POLITICS BUSINESS)