
WASHINGTON - AUGUST 10: U.S. President Barack Obama smiles on the South Lawn after returning to the White House after a weekend North America summit meeting on August 10, 2009 in Washington, DC. Obama met with President Felipe Calderon of Mexico and Prime Minister Stephen Harper of Canada in Guadalajara, Mexico, for the annual summit to discuss climate change and clean energy, the H1N1 flu pandemic, immigration, trade and the growing threat posed by organized crime. (Photo by Chip Somodevilla/Getty Images)
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