When it's this cold, Chicago sets its train tracks on fire
 

City's commuter rail system brings the heat to keep trains moving in extreme cold.http://feeds.feedburner.com/~ff/rss/...?d=yIl2AUoC8zA</img> http://feeds.feedburner.com/~ff/rss/...?d=7Q72WNTAKBA</img> http://feeds.feedburner.com/~ff/rss/...8Y:V_sGLiPBpWU</img> http://feeds.feedburner.com/~ff/rss/...?d=qj6IDK7rITs</img> http://feeds.feedburner.com/~ff/rss/...8Y:gIN9vFwOqvQ</img>


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