US President Barack Obama yawns as he attends an East Asian Summit Plenary Session at the Peace Palace in Phnom Penh on November 20, 2012. During the two-day East Asia Summit, Obama was scheduled to hold talks with the leaders of the 10-member Association of Southeast Asian Nations (ASEAN) along with Chinese Premier Wen Jiabao and Japan's Premier Yoshihiko Noda. AFP PHOTO Jewel Samad (Photo credit should read JEWEL SAMAD/AFP/Getty Images)