AdvertisementLondon's Mayor On 'The City That Made The World'06:13Download AudioResumeJune 02, 2012facebookEmailLondon Mayor Boris Johnson stands atop the ArcelorMittal Orbit, an observation tower in London's Olympic Park, at its unveiling on May 11. Johnson is the author of Johnson's Life of London: The People Who Made the City That Made the World. (Getty Images)