The Huge Mist Cannons That Keep the Air Clean in NYC's New Tunnels

We've followed the $10.8 billion East Side Access project, which will extend the Long Island Railroad from Queens to Grand Central, all year. But now that the tunnels have been blasted, new machines are arriving—and they're just as cool as the tunnel borers. » 3/20/14 2:00pm 3/20/14 2:00pm