Firefighters and police conducted two crucial tests of the system this week. In one, they set a series of controlled fires to see how quickly the tunnel's house-sized fans could pump out the smoke and pump in fresh air.
Source Framingham Metro West Daily News
Firefighters and police conducted two crucial tests of the system this week. In one, they set a series of controlled fires to see how quickly the tunnel's house-sized fans could pump out the smoke and pump in fresh air.
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