Michelle Obama, back on the book tour a year later, at Politics & Prose

Michelle Obama held her second book signing Tuesday morning at Politics & Prose, nearly a year after her gardening tome "American Grown" was released. Dressed in a black top with silver embellishment and a gold-green skirt, the first lady came in from the rain to greet the crowd of 250 or so at the independent bookstore near Chevy Chase, seeming chipper.