Snowstorm blankets nation's heartland

12 of 15: Residents help clear a sidewalk of snow during a fast moving winter storm Thursday, Feb. 21, 2013, in Springfield, Ill. Blinding snow bombarded much of the nation's midsection causing white out conditions, making major roadways all but impassable and shutting down schools and state legislatures. (AP Photo/Seth Perlman) (AP Photo/ Seth Perlman)

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