Atlantic City, N.J., has seen four casinos close this year, and a fifth may soon follow. Officials are trying to diversify the city's economy by weaning itself from gambling, its biggest industry. Yuki Noguchi/NPR hide caption

itoggle caption Yuki Noguchi/NPR

The city of Sao Paolo, Brazil, shot with a fisheye lens. Standards of living are improving not just in the big developing nations like Brazil, but also in smaller countries such as Bangladesh and Ghana. Daniel Incandela/Flickr via Wikimedia Commons hide caption

itoggle caption Daniel Incandela/Flickr via Wikimedia Commons