Thank you for that superb link MrEdd. It does give an excellent picture of what was going on at the SanDiego centre. The Kurdish users of the centre wouldn't appear (on the face of it) to have been raving nutters: but the story about the secretive sponsor of the building is raising alarm bells. It looks like this was an inside job after all.
I should just add an "IMO" to that. It's not stated in the article - just my hunch