Like they could be anything else but Iraqi Mobile Biological Warfare Agent Production Plants.

This would be falling into the same fallacy as Newsweek did, drawing a solid conclusion where nobody has one.

Personally, I think the CIA evidence for a BW production unit holds up pretty well, especially since I know something about military hydrogen generators and a lot about how rocket propellants are made. Most non-cryogenic rocket propellants are almost as toxic as chemical weapons themselves, and the non-toxic ones are unstable.

It is very likely that these things were in storage and never actually used, which makes analysis more difficult.