Some 120,000 people work in Tysons Corner, Va., but only 17,000 live there. To transform this hotbed of suburban gridlock into a green, walkable city, a soon-to-be-adopted plan-as envisioned by our artist-calls for as much as tripling the current square footage by expanding upward, with the tallest buildings located next to four new train stations, which should be completed by 2013.
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