You forgot to answer the question. Bad form answering a question with a question.
Actually it's not. It's a form of debate. A much older form than 'Well the Bush administration said so, so there'. But to answer your question you better check with Rummy
US Defence Secretary Donald Rumsfeld said careful tests were needed to confirm whether an artillery shell used in a roadside bomb in Iraq contained sarin nerve gas. Rumsfeld noted that the field test that detected the release of sarin "is not perfect".
Of course he would know this from all the false positives dating back to April of 2003
I just can't believe the absolute giddiness over one shell that may have had traces of sarin gas dating back ten years. One would think they had found all the WMDs we were told the Hussein regime had