The FBI is going to get away with pinning it on Ivins
The FBI (Fidelity, Bravery, Integrity, ha!) was tasked by our shadow government overlords with finding a semi-plausible fall guy for the anthrax attacks of 2001. These overlords engineered both the attacks of 9/11, and the anthrax attacks that followed, to create a pretext for a police state in the USA, as well as a semi-plausible pretext for invading Afghanistan and Iraq.
The FBI has pinned it on the late Dr. Bruce Ivins, but almost nobody believes it. For the past two days FBI director Mueller, looking like the cat that ate the canary, has been appearing before the Senate and House to answer questions.
Glenn Greenwald wrote about both events in Salon. Based on his account, I feel certain that the FBI is going to get away with it.