Investigators are virtually certain of one thing, though: it was an inside job. The anthrax attacker is an American scientist -- and worse, one from within the US's own biodefence establishment. And only now, four months on from the posting of the first letters, are the frightening implications of that beginning to sink in.
America's experience of bioterrorism was, above all, one of institutional failure and a breakdown in the trust on which those institutions are based. The US had its own bioweapons research turned against it-by one of its own. To add to the embarrassment, advances in the massive investigation so far owe more to the serendipity of a few researchers than to any organised response to bioterrorism.
::Debora MacKenzie, New Scientist: The Insider