New General Motors President Dan Ammann (center) addresses a Town Hall meeting with employees at the GM Renaissance Center Global Headquarters in Detroit, Michigan, after Chairman and CEO Dan Akerson (left) announced he is stepping down. Akerson's last day will be January 15, 2014. GM Executive Vice President, Global Product Development, Purchasing and Supply Chain Mary Barra (right) was selected by the Board of Directors to become the next CEO of the company. (Photo by Steve Fecht for General Motors)