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How the NYC Subway Works
How Are Subways Built Underground?
The Greatest Subway System in the World? | New York City Subway
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New York City Subway System - Historical Look from 1904 through 2004
New York's Subway System: The Most Expensive Railway Ever Constructed
'American Built:' History behind the NYC subway
Why Does New York's Subway have Ghost Stations? (History of NYC public transport) IT'S HISTORY
Secrets of the New York City subway system
The New York City Subway: An Express History Tour
New York’s SECRET Subway | WHAT THE PAST?
The Secret Subway That Could Save New York
River of Steel: The Building of the New York City Subway
New York Dumped More Than 2,500 Subway Cars Into the Ocean: Then This Happens 20 Years Later
How are subways built? | General KnOWLedge
Why The NYC Subway Is Such A Mess
NYC Subway Survival Guide (Watch Before You Go!)