U.S. President George W. Bush speaks with the media after viewing alternative fuel vehicles on the South Lawn of the White House on March 26, 2007. From left are Rick Wagoner, chairman and CEO of General Motors, Alan Mulally, president and CEO of Ford Motor Company, Bush, Tom Lasorda, president and CEO of the Chrysler Group, and Secretary of Transportation Mary E. Peters. (UPI Photo/Roger L. Wollenberg)