Feds release gas in NYC subway to study for potential terror attack

Associated Press NEW YORK — Homeland security officials are releasing an invisible, odorless, harmless gas into part of New York City's subway system as part of a test of how air moves through the tunnels and platforms. They say the data would be useful in understanding how biological contaminants might move through the tunnels during a terrorist attack. The test started Monday and will last …
Source: Police Updates
Feds release gas in NYC subway to study for potential terror attack