In this photo provided by ComEd, from left, Senior Vice President of 

In this photo provided by ComEd, from left, Senior Vice President of ComEd Fidel Marquez, ComEd customer Kathy Reiser, her children Caitlin and Ramsey, Navy Pier director of External Communications Nick Shields and Ald. Brendan Reilly, 42 Ward, pose for a photo as they turn off the lights of the Ferris Wheel at Navy Pier in observation of Earth Hour in Chicago on Saturday, March 23, 2013. (AP Photo/ComEd, Charles Osgood)
Associated Press
In this photo provided by ComEd, from left, Senior Vice President of ComEd Fidel Marquez, ComEd customer Kathy Reiser, her children Caitlin and Ramsey, Navy Pier director of External Communications Nick Shields and Ald. Brendan Reilly, 42 Ward, pose for a photo as they turn off the lights of the Ferris Wheel at Navy Pier in observation of Earth Hour in Chicago on Saturday, March 23, 2013. (AP Photo/ComEd, Charles Osgood)
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