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... more 
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 | Photo By Susan Walsh
Tue, May 7, 2013 4:14 PM EDT