First lady Michelle Obama signs copies of her book "American Grown: The Story of the White House Kitchen Garden and Garden Across America" at the Politics & Prose bookstore in Washington, Tuesday,

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First lady Michelle Obama signs copies of her book "American Grown: The Story of the White House Kitchen Garden and Garden Across America" at the Politics & Prose bookstore in Washington, Tuesday, May 7, 2013. (AP Photo/Susan Walsh) less 

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Associated Press
Tue, May 7, 2013 8:57 PM EDT