Ford unveils the Vertrek concept car at the North American International Auto Show (NAIAS) in Detroit, the United States, Jan. 10, 2011. The 2011 NAIAS kicked off on Monday at the Cobo center in Detroit, the US auto city, with more than 40 global top-notch auto brands showcasing their latest products and technology. [Xinhua]

Olivier Francois, president and Chief Executive Officer of Chrysler brand, poses during the unveiling of the Chrysler 300 sedan at the North American International Auto Show (NAIAS) in Detroit, the United States, Jan. 10, 2011. The 2011 NAIAS kicked off on Monday at the Cobo center in Detroit, the US auto city, with more than 40 global top-notch auto brands showcasing their latest products and technology. [Xinhua]