The embedds video was quite clear, they broke the seal, the contents of the building were intact at that time.
Considering Al-Douri was on the loose (and still is) and that the materiels were used in the UN bombing, think the conclusion is evident. He knew where the sheet was and, when it became apparent it was undefended, went and got three hundred tonnes plus.
And it does not answer my own question, it proves incompetence at the highest level.
particulary after witnessing the carnage the crap has been responsible for.