[Eroteme]

I have long believed the anthrax was aerosolized overseas and brought here. I bring up the possibility only because the reports of late-night noises and late night swims have nagged at me since I first heard about them. The major argument against a connection is the lack of residual particulate contamination in the apartment. It seems unlikely amateurs would have so successfully contained everything.

Perhaps there was a corollary operation? One that was intended to be based out of the Fort Lee office building, but for unexpected reasons, got relocated. We do know, from this Parascandola article, that Abbas rented the entire top floor of a commercial building in June. He obviously didn't need that kind of space to kite checks. Though the article does not specify dates, we can deduce from context that he took delivery of the machine in mid to late July. Shortly thereafter, late July to early August, Abbas abandoned the lease.

Atta was making inquiries about crop dusters just about that time. But with all the time they'd had to plan, this seems awfully late to start thinking about it--unless it were "back to the drawing board" response to something that had gone awry, say, in Minneapolis when Moussoui was arrested?

[Nogbad]

I have long believed the anthrax was aerosolized overseas and brought here.

Yes, and probably the envelopes were filled overseas as well.
But I have long speculated that some extra lower-grade anthrax was provided
to the hijackers to play around with
so that they wouldn't be tempted to open the envelopes
and use the high-grade stuff in some other way.