re: Hey, there's no absolute proof they WEREN'T ice cream trucks! ;)
If they were for making hydrogen for rockets or balloons, why would they be mobile? Why would they try to hide such things from UN inspectors. Processing Hydrogen was not against the UN resolution.. They could have done it in some permanent building.
The whole thing about it being mobile screams they were hiding something.
Speaking of hiding something, I have yet to see a good reason by those who claim Saddam didn’t have WMD and/or he wasn’t pursing them, as to why he was playing hide and seek with the UN Inspectors.