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 by placing air sampling devices in specific areas on the street and within the subway system. The gases mimic how a chemical, biological or radiological weapon may react if released.
Police Commissioner Raymond Kelly said Wednesday that the study will help safeguard the city against attacks.
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