Just for the record - stockpiles of chemical or biological weapons were never the principle reason for the coalition to remove Saddam from power.
But the lack of these stockpiles is something those who have opposed the war have, in my view, cynically jumped onto to argue that the war was unjustified (as if those who were in favor of removing Saddam were losing sleep over mustard gas).
Anyway, they are apparently starting to find some of this stuff. For whatever it's worth.