The Toyota Prius-C concept car is revealed during the press days for the North American International Auto show in Detroit, Michigan, Jan 10, 2011. The 2011 NAIAS kicked off on Jan.10, 2011 at the Cobo center in Detroit, the U.S. auto city, with more than 40 global top-notch auto brands showcasing their latest products and technology.  [Photo/Xinhua]