Interesting article on the Anthrax attacks in the Wall Street Journal this week. It sounds like the FBI know much much more than they are telling. It doesn't look good folks...
EXERPT.
'' Yet the anthrax grown from it had silicon, according to the U.S. Armed Forces Institute of Pathology. This silicon explained why, when the letters to Sens. Leahy and Daschle were opened, the anthrax vaporized into an aerosol. If so, then somehow silicon was added to the anthrax. But Ivins, no matter how weird he may have been, had neither the set of skills nor the means to attach silicon to anthrax spores.
At a minimum, such a process would require highly specialized equipment that did not exist in Ivins's lab—or, for that matter, anywhere at the Fort Detrick facility. As Richard Spertzel, a former biodefense scientist who worked with Ivins, explained in a private briefing on Jan. 7, 2009, the lab didn't even deal with anthrax in powdered form, adding, "I don't think there's anyone there who would have the foggiest idea how to do it." So while Ivins's death provided a convenient fall guy, the silicon content still needed to be explained.
The FBI's answer was that the anthrax contained only traces of silicon, and those, it theorized, could have been accidently absorbed by the spores from the water and nutrient in which they were grown. No such nutrients were ever found in Ivins's lab, nor, for that matter, did anyone ever see Ivins attempt to produce any unauthorized anthrax (a process which would have involved him using scores of flasks.) But since no one knew what nutrients had been used to grow the attack anthrax, it was at least possible that they had traces of silicon in them that accidently contaminated the anthrax.
Natural contamination was an elegant theory that ran into problems after Congressman Jerry Nadler pressed FBI Director Robert Mueller in September 2008 to provide the House Judiciary Committee with a missing piece of data: the precise percentage of silicon contained in the anthrax used in the attacks.
The answer came seven months later on April 17, 2009. According to the FBI lab, 1.4% of the powder in the Leahy letter was silicon. "This is a shockingly high proportion," explained Stuart Jacobson, an expert in small particle chemistry. "It is a number one would expect from the deliberate weaponization of anthrax, but not from any conceivable accidental contamination."
http://online.wsj.com/article/SB10001424052748704541004575011421223515284.html