Need To Know

The Thin Green Line

Clip: Season 1 | 8m 42s

Alison Stewart tours The High Line, a year-old elevated park in Manhattan. Built atop an old train trestle, it has already drawn millions of visitors. But it's more than a nice place to relax and take in the view -- it's an economic engine.

Aired: 09/16/10

Expired: 09/16/15

Rating: NR

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