So Richard Spertzel, former U.N. weapons inspector, had this to say in WSJ:
Information released by the FBI over the past seven years indicates a product of exceptional quality. The product contained essentially pure spores. The particle size was 1.5 to 3 microns in diameter. There are several methods used to produce anthrax that small. But most of them require milling the spores to a size small enough that it can be inhaled into the lower reaches of the lungs. In this case, however, the anthrax spores were not milled.
What’s more, they were also tailored to make them potentially more dangerous. According to a FBI news release from November 2001, the particles were coated by a “product not seen previously to be used in this fashion before.” Apparently, the spores were coated with a polyglass which tightly bound hydrophilic silica to each particle. That’s what was briefed (according to one of my former weapons inspectors at the United Nations Special Commission) by the FBI to the German Foreign Ministry at the time.
Another FBI leak indicated that each particle was given a weak electric charge, thereby causing the particles to repel each other at the molecular level. This made it easier for the spores to float in the air, and increased their retention in the lungs.
Um, no. I’ll trust a peer-reviewed assessment over some policy-pressurized briefing, thank you.
According to the FBI scientist who analyzed the anthrax letters, Douglas Beecher, it was NOT “weaponized.” He published this in Applied and Environmental Microbiology in 2006.
Individuals familiar with the compositions of the powders in the letters have indicated that they were comprised simply of spores purified to different extents (6). However, a widely circulated misconception is that the spores were produced using additives and sophisticated engineering supposedly akin to military weapon production. This idea is usually the basis for implying that the powders were inordinately dangerous compared to spores alone (3, 6, 12; J. Kelly, Washington Times, 21 October 2003; G. Gugliotta and G. Matsumoto, The Washington Post, 28 October 2002). The persistent credence given to this impression fosters erroneous preconceptions, which may misguide research and preparedness efforts and generally detract from the magnitude of hazards posed by simple spore preparations.
Purification of spores may exacerbate their dissemination to some extent by removing adhesive contaminants and maximizing the spore concentration. However, even in a crude state, dried microbial agents have long been considered especially hazardous. Experiments mimicking laboratory accidents have demonstrated that simply breaking vials of lyophilized bacterial cultures creates concentrated and persistent aerosols (4, 8). The potential for propagating disease with crude lyophilized material is illustrated by an outbreak of 24 cases of Venezuelan equine encephalitis throughout three floors of a Moscow virology institute. These infections were caused when vials containing dried infected mouse brain were accidentally broken on a stairwell landing and were spread by air currents and foot traffic (11).
Can we just put this to rest? Dry it, grind it up. It’s good enough for envelope dissemination. Poof!