Bush didn't believe his own "proof"

The Al Qa-Qaa facility was named in the famous British Dossier Says Iraq Has 'Military Plans' for Use of WMD.  It said that:

"10. Parts of the al-Qa'qa' chemical complex damaged in the Gulf War have also been repaired and are operational. Of particular concern are elements of the phosgene production plant at al-Qa'qa'. These were severely damaged during the Gulf War, and dismantled under UNSCOM supervision, but have since been rebuilt. While phosgene does have industrial uses it can also be used by itself as a chemical agent or as a precursor for nerve agent."

So why weren't the troops of the 101st ordered to thoroughly search the facility when the arrived after the Gulf II invasion?

I guess even Bush doesn't believe Bush.