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An advanced DNA analysis matched the anthrax used in the attacks to a specific batch controlled by Ivins. It is unclear, however, how the FBI eliminated as suspects others in the lab who had access to it.
We now see reports ( at least here in glens comments) that Ivins' lab was one if the first labs to receive samples of the anthrax in the attack. The first thing he would have done is culture it to get enough DNA material to sequence it. Are we saying now the the FBI "matched the anthrax to a specific batch controlled by Ivins?"
Get a grip