(121105) -- CHICAGO, Nov. 5, 2012 (Xinhua) -- Visitors take photos inside a lift of Willis Tower in Chicago, the United States, Nov. 4, 2012. Located in the State of Illinois, Chicago is the third largest city of the United States with approximately 2.9 million residents. The city, best known as Wind City, is an international hub for finance, commerce, industry, telecommunications and transpotation. U.S. President Barack Obama will wait for the final results of presidential election here, as the city is the headquarters of his electoral campaign, together with his supporters on Tuesday night. (Xinhua/Yang Lei) (lyx)
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