What Else is Iran Hiding

One of the underlying themes in recent reports of Iran's recently revealed enrichment facility is that the Iranian government has been deceiving the international community about its activities.  Deception or outright lying by the revolutionary government is nothing new.  Abbas Milani pointed out this behavior last year, in reference to an NIE report on Iran's activities.  Recently, there have also been reports from the UN that the Iranians are capable of building an atomic weapon, and a resistance group has reported that they are actively working on weaponization.   Given this, who knows what else they have been hiding, both in terms of their infrastructure and capabilities, as well as their plans for the future in the event they begin building a functional arsenal?