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The President responds to a question at the Republican House Issues Conference in Baltimore, Maryland, on January 29, 2010. Saul Loeb/AFP/Getty Images hide caption

itoggle caption Saul Loeb/AFP/Getty Images

Bill and Melinda Gates in Davos, Switzerland, January 29, 2010. FABRICE COFFRINI/AFP/Getty Images hide caption

itoggle caption FABRICE COFFRINI/AFP/Getty Images