It's also a lousy bit of engineering. If the diameter of the tank is 4.6m then the portal frames of the building are far too flimsy for the span. And where are the support columns for the piping to/from the tank? Is this supposed to be 'evidence' that Iran has a nuclear weapons program? Pathetic! People are going to die based on this nonsense?
18 Turkish journalists face prison for 'terror propaganda' (AP)
from the article: New image reportedly depicts Iran's military nuclear testing site