October 12, 2012 -- Updated 1713 GMT (0113 HKT) In this file picture taken on September 9, 2008, British scientist Keith Campbell speaks at the Shaw Prize award presentation ceremony in Hong Kong. October 12, 2012 -- Updated 1858 GMT (0258 HKT) CNN's Richard Quest travels across the U.S. to gauge opinion ahead of next month's presidential vote. He starts in Chicago -- Obama country.