Calling Agent Frank Black! Anthrax, Millennium, and the Dr. Strangelove of the American Left
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The aforementioned Barbara Hatch Rosenberg. Hatfill is the fourth scientist she has fingered (she changes her story with some frequency).
The others had either AMRIID ties, CIA connections or a Battelle Institute (a purported CIA contractor) link.
Her agenda is quite clear. To force the US into signing the UN's Anti-Biological Warfare treaty, apparently by implicating the military/intelligence community responsible for our defense against biowarfare.