Comment: Here's something to watch:

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Here's something to watch:

The New York Police Department is teaming up with a national laboratory to study how chemical weapons could be dispersed through the air into the subway system.

Researchers will track the movement of harmless tracer gases. They'll place air sampling devices in specific areas on the street and within the subway system. The gases mimic how a chemical or biological weapon may react if released.

http://www.myfoxny.com/story/22065673/nypd-teams-with-us-lab...