The problem we have is that when you ask questions, you tend to ask them in such a way that the only possible answer is the answer you want. So, the answers cannot be trusted.
The anthrax in the letters was not "raw spores." The spores were treated with a surfactant before drying. Did you ask if it was possible to treat spores with an ORGANIC surfactant that would create a powder like that in the letters? If not, why not?