Take it up with Geisbert, Jahrling and AFIP.
AFIP clearly stated that silica was a key aerosol enabling component of the Daschle anthrax.
No, they didn't. That just more of your twisting of the facts.
In their self-serving newsletter, AFIP said:
“Ft Detrick sought our assistance to determine the specific components of the anthrax found in the Daschle letter,” said Florabel G. Mullick, MD, ScD, SES, AFIP Principal Deputy Director and department chair. AFIP experts utilized an energy dispersive X-ray spectrometer (an instrument used to detect the presence of otherwise-unseen chemicals through characteristic wavelengths of X-ray light) to confirm the previously unidentifiable substance as silica. “This was a key component,” Mullick said. “Silica prevents the anthrax from aggregating, making it easier to aerosolize. Significantly, we noted the absence of aluminum with the silica. This combination had previously been found in anthrax produced by Iraq.”
The AFIP article says the chemical they were trying to detect with the EDX was OTHERWISE UNSEEN and then they explain some things in general terms. But THEY DID NOT SEE ANY SILICA, so its purpose was unknown. Generally, though, "Silica prevents the anthrax from aggregating, making it easier to aerosolize." No one disputes that.
They CERTAINLY didn't see any coating. And General Parker later said,
I’d like to say that, although we may see some things on the microscopic field that may look like foreign elements, we don’t know that they’re additives, we don’t know what they are, and we’re continuing to do research to find out what they possible could be. They’re unknowns to us at this present time.
The fact that AFIP wrote their comment after General Parker said what he said doesn't mean anything. The known information shows that AFIP only saw the Daschle anthrax for a few hours one day. Geisbert brought the sample to AFIP already prepared and ready for the EDX. And he undoubtedly took the sample with him when he left.