Photos: Underground shots of NYC's Second Ave. subway project

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Photos: Underground shots of NYC's Second Ave. subway project

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Photos: Underground shots of NYC's Second Ave. subway project

by CBSTV Videos 2:29 mins

New York City's Second Ave. subway was first conceived almost a century ago and when it is completed, it will extend all the way down the eastern side of Manhattan with 16 new stations. CBS News' Don Dahler reports on one of the most challenging public works projects in the country.

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