HAMTRAMCK, MI - OCTOBER 11: Assembly line workers assemble Chevy Volt electric vehicles and Opel Amperas at the General Motors Detroit Hamtramck Assembly Plant October 11, 2011 in Hamtramck, ... more 
HAMTRAMCK, MI - OCTOBER 11: Assembly line workers assemble Chevy Volt electric vehicles and Opel Amperas at the General Motors Detroit Hamtramck Assembly Plant October 11, 2011 in Hamtramck, Michigan. Officials from the White House Council on Environmental Quality and the National Highway Traffic Safety Administration toured the plant today to highlight the Obama administrations fuel economy standards. (photo by Bill Pugliano/Getty Images) less 
1 / 22
Getty Images | Photo By Bill Pugliano / Getty Images
Tue, Oct 11, 2011 6:20 PM EDT