Tom Stephens, vice chairman of General Motors, holds up the North American International Auto Show Car of the Year trophy awarded to the Chevrolet Volt Monday, Jan. 10, 2011. (AP Photo/Paul Sancya)
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Tom Stephens, vice chairman of General Motors, holds up the North American International Auto Show Car of the Year trophy awarded to the Chevrolet Volt Monday, Jan. 10, 2011. (AP Photo/Paul Sancya)
