Myanmar's Prime Minister General Thein Sein (L) is greeted by Vietnam's Prime Minister Nguyen Tan Dung before the 16th ASEAN Summit in Hanoi April 8, 2010. Southeast Asian leaders will talk about building a strong economic and political community on Thursday at an annual summit clouded by unrest in Thailand and Myanmar's widely derided election plans. REUTERS/Kham (VIETNAM - Tags: POLITICS)