Boston.com
Brock Parker, 8/27/12
NICOLAUS CZARNECKI/METRO
The federal government Wednesday will begin releasing bacteria at Red Line MBTA stations in Cambridge and Somerville at set times to test sensors designed to detect biological agents that could be released in a terrorist attack.
The U.S. Department of Homeland Security and the Massachusetts Bay Transportation Authority said in a press release Monday that the harmless bacteria is non-infectious and the tests will be performed when the stations are closed.
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