Actor Jessica Alba, accompanied by Sen. Frank Lautenberg (D-NJ), reacts when a buzzer calling for a vote goes off during a news conference on Capitol Hill Tuesday about chemical regulation. Evan Vucci/AP hide caption

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During a demonstration in Chicago, Jack Nugent (right), part of a group organized by Corporate Accountability International, urged a pedestrian to support his cause calling for McDonald's to retire Ronald McDonald in March 2010. Scott Olson/Getty Images hide caption

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A doctor views CT scans in the emergency room at Coney Island Hospital in New York. Mario Tama/Getty Images hide caption

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Jamie Oliver during a scene filmed in Los Angeles from the second season of "Jamie Oliver's Food Revolution" on ABC. Mitch Haddad/AP hide caption

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The new nutrition law gives local providers preference when they bid for school food contracts. Christopher Furlong/Getty Images hide caption

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