The Federal Bureau of Investigation (FBI) has provided the U.S. National Academy of Sciences (NAS) with a list of 15 questions that it wants the academy to consider in its review of the scientific evidence in the FBI's case against Bruce Ivins, the Army microbiologist implicated in the anthrax letter attacks of 2001. Besides asking whether the genomic analysis carried out to trace the source of the anthrax was valid, the questions address aspects such as the source of silicon found in the spores and whether the attacker needed specialized equipment to grind the spores into an easily dispersible powder.
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