Pedestrian and auto traffic snarl Wednesday, June 12, 2013, in Chicago as 

Pedestrian and auto traffic snarl Wednesday, June 12, 2013, in Chicago as commuters race to avoid an unusually massive line of storms packing hail, lightning and tree-toppling winds that have been forecast for evening rush hour. (AP Photo/M. Spencer Green)
Associated Press
Pedestrian and auto traffic snarl Wednesday, June 12, 2013, in Chicago as commuters race to avoid an unusually massive line of storms packing hail, lightning and tree-toppling winds that have been forecast for evening rush hour. (AP Photo/M. Spencer Green)
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