A tornado touched down near 's main airport on Wednesday night, sending travelers scrambling for cover and disrupting hundreds of flights. from inside O'Hare International Airport shows the funnel cloud forming not far from the runway as commercial airplanes taxied at the gate.The National Weather Service confirmed that that at least tornados touched down in the area at around 7pm CT, prompting a tornado warning in Cook County and triggering sirens in Chicago's downtown Loop district.
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