(12.7.2002) The choice of B‘nai B‘rith probably was meant to suggest Arab terrorists, because the building had once been the target of an assault by Muslim gunmen. In the same way, F.B.I. profilers are convinced that the real anthrax attacks last year were conducted by an American scientist trying to pin the blame on Arabs.

In a column on July 2 I wrote about “Mr. Z,“ an American bio-defense insider who intrigues investigators and whose career has been spent in the shadowy world of counterterror and intelligence. He denies any involvement in the anthrax attacks.