From right, Cambodia’s Prime Minister Hun Sen, Brunei’s Sultan Hassanal Bolkiah, Singapore’s Prime Minister Lee Hsien Loong, Philippines’ President Benigno Aquino III and Malaysia’s Prime Minister Najib Razak arrive for a singing ceremony of adoption of the ASEAN Human Rights Declaration during the 21st Association of Southeast Asian Nations, or ASEAN Summit in Phnom Penh, Cambodia, Sunday, Nov. 18, 2012. AP /Vincent Thian