U.S. President Barack Obama yawns at the beginning of the East Asian Summit Plenary Session at the Peace Palace in Phnom Penh, Cambodia, Tuesday, Nov. 20, 2012. (AP Photo/Carolyn Kaster)

Associated Press
U.S. President Barack Obama yawns at the beginning of the East Asian Summit Plenary Session at the Peace Palace in Phnom Penh, Cambodia, Tuesday, Nov. 20, 2012. (AP Photo/Carolyn Kaster)
U.S. President Barack Obama yawns at the beginning of the East Asian Summit Plenary Session at the Peace Palace in Phnom Penh, Cambodia, Tuesday, Nov. 20, 2012. (AP Photo/Carolyn Kaster)
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