Chicago is a city in the United States in the state of Illinois. Chicago was founded in 1833. The city is a world financial center, with the second largest central business district in the United States. The Chicago O'Hare International Airport (O'Hare Airport, O'Hare Field, or simply O'Hare), is the major airport of Chicago. The Chicago Midway International Airport (also known as Midway Airport or Midway), is the second important airport in Chicago.
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