Content Section
A United Airlines airplane passes by an American Airlines plane at the O'Hare Airport in Chicago, Illinois October 2, 2014. Incoming stormy weather and operational problems caused by a fire last week at a Chicago-area air traffic control facility forced the cancellation of nearly 750 flights on Thursday at Chicago airports.  REUTERS/Jim Young (UNITED STATES - Tags: TRANSPORT ENVIRONMENT) - RTR48PUT Jim Young/Reuters