[Merovingian]

We are not getting a straight answer on that. I hear about fans that blow dust off of the machinery they use to sort the mail...???

[mostlyundecided]

That's also what I heard, the machine that processed the letters was contaminated and that machine is cleaned with an air gun - which would have made the particles airborn. This means at least one of the envelopes was leaking or that the anthrax so small it goes right through the fibers of the envelope. (my guess of course on the envelope leaking)