U.S. President Obama gestures during a town hall meeting with future Chinese leaders at the Museum of Science and Technology in Shanghai

U.S. President Barack Obama gestures during a town hall meeting with future Chinese leaders at the Museum of Science and Technology in Shanghai November 16, 2009. Obama faces tensions with China over trade and Tibet on his first visit to the emerging superpower for a summit that will grapple with economic imbalances and the future of the yuan. REUTERS/Jason Reed (CHINA POLITICS)