With a few dull thuds, the 1-ton bag of high-strength fabric tumbled from the wall of the mock subway tunnel and onto the floor. Then it began to grow. As air flowed into it through a hose, the bundle ...

What’s the best way to plug a giant hole? Why with a giant plug, of course. That’s the thinking of the Department of Homeland Security’s (DHS) Science and Technology Directorate (S&T), which has ...

Huge inflatable plugs – now being developed by the federal government to protect subway tunnels from terrorist attacks – likely could have saved some of New York’s subway tunnels from storm-related ...