` While we do n't want to ride the back of a disaster , it 's certainly our hope that people will look at this technology , '' Holter said . Developers say inflatable plugs might have saved some subway tunnels from flooding . They are under development as a tool to protect tunnels in a terrorist attack . Manufacturer : `` We 've proved that these plugs can hold back water '' and they're not just for the New York City Subway, but also for other cities around the world. Plug has promise but not ready for use yet .
Developers say inflatable plugs might have saved some subway tunnels from flooding . They are under development as a tool to protect tunnels in a terrorist attack . Manufacturer : `` We 've proved that these plugs can hold back water '' and they're not just for the New York City Subway, but also for other cities around the world. Plug has promise but not ready for use yet .