I share James' (OTB) concern that these announcements come out before we really know for certain what we have, but this looks like they are pretty sure. Indeed, this is been commented on quite differently than previous "finds."
Aboard the trailer was equipment that can be used to make biological weapons -- living microorganisms or biological toxins used deliberately to spread disease -- including a fermenter that could help produce germ warfare agents, he said.Other equipment included gas cylinders to supply clear air for agent production and a system to capture and compress exhaust gases to evade detection of weapons production.
[...]
Cambone said the truck was very similar to those described by an Iraqi defector who has helped U.S. officials understand the Iraqi weapons program.
Source:
U.S. Finds Iraqi Mobile Germ Warfare Lab -Pentagon