Chicago Auto Show (19 images)

A 2012 pre-production Nissan Leaf is displayed at the Chicago Auto Show at McCormick Place in Chicago on February 9, 2011. UPI/Brian Kersey

A Chevy Volt charger is displayed at the Chicago Auto Show at McCormick Place in Chicago on February 9, 2011. UPI/Brian Kersey

A Jeep Grand Cherokee drives on a test track at the Chicago Auto Show at McCormick Place in Chicago on February 9, 2011. UPI/Brian Kersey

A Jeep Rubicon drives on a test track at the Chicago Auto Show at McCormick Place in Chicago on February 9, 2011. UPI/Brian Kersey