Subway airflow tests to prepare T for possible terror attacks – The Boston Globe

A team of researchers convened by the U.S. Department of Homeland Security began a series of tests today at 20 MBTA stations to determine how airborne contaminants would spread in a terrorist attack on Boston’s subway system.

Threats of a chemical attack have been made against the New York subway system since the Sept. 11, 2001 terrorist attacks. In 1995, a sarin gas attack on the Tokyo subway system by domestic terrorists killed 12 people and injured dozens. Boston’s MBTA system has never received a threat or attack, said MBTA Police Chief Paul MacMillan.