That sarin and mustard gas shells were found in Iraq is pretty well known. All you need to do is search Sarin Mustard Iraq to find old stories on this:
You may find even more if you google Iraq and each type of gas alone. But you are banging your head against the wall, the left and particularly the left media do not letf facts get in the way of their narrative.
There were pictures of various WMDs on the web at the time.
There was also that interview with Powell and the video of that caravan of trucks hauling something to Syria.
And a scud missile left on the streets of Baghdad.
And all the stuff buried in scientists and government officals' backyards.
And what about all the masks, suits, medicines, etc. found in the bunkers. Of course there were WMD.