Actually, the UN wanted to censor the document. The stated reason was that the document contained detailed instructions on how to make weapons of mass destruction. If true, then censoring those parts from widespread distribution is reasonable. People already complain that kids can download bomb making instructions from the Internet. It'd be much worse if they (or other nations currently lacking the technical knowledge) learned how to make chemical weapons.

The US and some other nations demanded the UN give them the full 12,000 pages of documents. Several European companies have already been mentioned prominently in those documents. I have not heard of any US firms, but if they are in there and did anything illegal to help Iraq, then they should be prosecuted to the fullest extent of the law.