Richard Spertzel, head of the biological-weapons section of Unscom from 1994-99, nd a member of the Iraq Survey Group, wrote an Op/Ed in the Wall Street Journal that I highly recommend.

Basically, he says that Bruce Ivins, and everyone at the lab, worked on the bacteria in growth media, and did not have the equipment to make the weaponized form, which is powdered and given coatings to create a static charge to further spread the powder:

From what we know so far, Bruce Ivins, although potentially a brilliant scientist, was not that man. The multiple disciplines and technologies required to make the anthrax in this case do not exist at Army’s Medical Research Institute of Infectious Diseases. Inhalation studies are conducted at the institute, but they are done using liquid preparations, not powdered products.

(emphasis mine)