Interestingly this development, the "no addititve" assertion, does no hurt but helps the FBI case against, or from, Dr. Hatfill.
The small flurry of articles on the anniversary gave the impression the set of perps was greatly enlarged and went beyond people of Hatfill's expertise. To the degree they admitted the Ames strain is in labs across the world this certainly spread the possibility of perps.
But regarding sophitication the media spin was wrong. In reality, IIRC, the weaponization (or whatever you call it) process tended to preclude Hatfill as a suspect, not include. His degree and experience lent itself to vaccine research and such, but the expertise of someone like a chemical engineer, and access to appropriate equipment, was required to produce the "weaponized" product.
See post #80