Carol Browner (right) director of the Office of Energy and Climate Change listens as General Motors Vice President Global Design Ed Welburn gives her a tour of the Cadillac Converj electric luxury coupe concept vehicle at the Washington D.C. Auto Show Tuesday, February 3, 2009 in Washington, D.C. The four-passenger vehicle will provide up to 40 miles of gas-and-emissions-free electric driving with extended-range capability of hundreds of miles. (Photo by Mark Finkenstaedt for General Motors)
