The Iraqi General says it was passenger air liners stripped of their seats that were used to ship WMDs. Why not both?
It could have been both...there was probably a heck of a lot to move in a short period of time...since they didn't know for sure when the US would invade..
Also, remember there were Russian officials still in Baghdad the day we invaded...and they barely got out.
I am sure they were trying to get rid of the evidence of their complicity in the WMD program and move.