[photochemsyn]

DOE lab Sandia at least was closely involved with analysis of the anthrax powder in the letters mailed to Senators Daschle and Leahy on 10/09/2001. Note that this research didn't support the Bruce Ivins hypothesis as he didn't have the technical capacity required:

> "Not only did the Sandia researchers spot silicon, they also found tin, oxygen, and iron all within the spore. The researchers, led by Sandia chemist Joseph Michael, have presented their findings at various scientific meetings since 2008, reporting the presence of all the elements found. But because silicon had always been in the investigative limelight, tin never got much attention. Until now. The new paper puts the spotlight on tin, which the authors claim has been brushed under the carpet by FBI investigators. The FBI has "avoided public mention of the extraordinary presence of Tin," the paper says."

https://www.science.org/content/article/new-challenge-fbis-a...

While it's perhaps not widely known, the DOE National Labs have the best technical capabilities for investigating anything related to nuclear, chemical, and biological weapons whether of nation-state, terrorist-group, or lone-nut origin.