new york city is in the process of making that subway system even bigger. it's adding a new line as part of the city's first major subway expansion in 50 years. new yorktransportationofficials say once it's done, the new line will help reduce overcrowding and delays. but that's doesn't happen quickly and that doesn't happen cheaply.
ali velshi looks at what's involved.
backhoe excavators that can cost $700,000 apiece, manlifts that sell for up to half a million bucks, see that hydra
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