A United Airlines jet blows snow on a runway at O'Hare International Airport, Sunday, Feb. 1, 2015, in Chicago. More than 1,100 flights have been canceled at Chicago's airports and snow-covered roads ... more 
A United Airlines jet blows snow on a runway at O'Hare International Airport, Sunday, Feb. 1, 2015, in Chicago. More than 1,100 flights have been canceled at Chicago's airports and snow-covered roads are making travel treacherous. (AP Photo/Nam Y. Huh) less 
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Associated Press | Photo By Nam Y. Huh
Sun, Feb 1, 2015 3:48 PM EST