Photo Gallery: 100 Years of Chevy 24/45

President Barack Obama, accompanied by Assembly Manager Teri Quigley, gets behind the wheel of the new Chevy Volt, during his tour of the General Motors Auto Plant in Hamtramck, Mich., Friday, July 30, 2010. The plant is where the Volt, an electric car will be assembled. (AP Photo/Pablo Martinez Monsivais)