A General Motors Co. Chevrolet Volt is displayed at the 2012 North American International Auto Show (NAIAS) in Detroit on Jan. 9, 2012. Photographer: Scott Eells/Bloomberg
A General Motors Co. Chevrolet Volt is displayed at the 2012 North American International Auto Show (NAIAS) in Detroit on Jan. 9, 2012. Photographer: Scott Eells/Bloomberg
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