Keeping Chicago's L Running | Strip the City


Duration = 02:24

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Chicago has to think creatively to keep the system running during harsh weather. | For more Strip the City, visit http://science.discovery.com/tv-shows/strip-the-city/#mkcpgn=ytsci1 Subscribe to Science Channel! | http://www.youtube.com/subscription_center?add_user=sciencechannel Watch full episodes! | http://bit.ly/StriptheCityFullEpisodes
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