60% enriched uranium is not quite considered weapons-grade, but also has no civilian applications. Hiding the facility is immaterial if the facility is doing stuff that isn't useful for non-weapon work.
Iran did not expect to be bombed back at all, which is why their defenses were so shoddy around nearly everything. The _only_ thing having this level of protection is the enrichment facility.
That's a separate question. I am just responding to the people saying we don't know they are enriching uranium for nuclear weapons. Of course they are.
