There must be some other reason why they think it might be anthrax.
Field tests ought to have more false positives than false negs to be on the safe side.
The Wallingford one was proved false. We can't discount stuff though. But after the Senate Office ricin, I think they're watching to see "HOW WE REACT"...a favorite alqueda tactic. Similar to the dude in the AMI scenario?
Think we're being told very little right now.