Crowds of passengers took shelter inside O'Hare Airport as hundreds of flights are delayed amid severe storms, tornado warnings: 'I have never seen anything like this'
![Chicago's O'Hare Airport aims to become U.S.'s first truly global hub as American and United bury hatchet - MarketWatch Chicago's O'Hare Airport aims to become U.S.'s first truly global hub as American and United bury hatchet - MarketWatch](https://s.marketwatch.com/public/resources/images/MW-ER668_ohare__ZG_20160715163636.jpg)
Chicago's O'Hare Airport aims to become U.S.'s first truly global hub as American and United bury hatchet - MarketWatch
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