Ok, this is SADM, nuclear manpack. (yes, those one's from Houston) ...the manafacture was disrupt...the reason is, the science returned back to the latest 60th's theory, that the neutrons fusion, does not happen correctly, if placed from bottom to top. One of the reasons, why the nuclear suitcase, is building concept, comes from left to right. This happens bcz, since the neutrons run free, and their movement are in circle, incredible also, on the opositive of the time clock, the initiator of the chain starts in left. You can watch the mushroom, doing a circle of detonation. On the other hand, its also defined by now, that only the impact, will create enought force for the nuclear chain. About Iran's treads , let's imagine, they hv one hit, and that's imagine they strike London...how many defense rings would the missile find, how many neutralizers on the way? That's why nuclear deterrence is just bullshit talk! Even if warfare is conducted on the offensive side, the most important is the defense. The iranians are for long years trying to adapt some nuclear soviet ogives they got, to their own missiles, but the electronics are also crucial to the armament, it could happen, since they did not do no test, what happened in NK, which ended up, killing their own. And I tell you more, about the nuclear IED's possible real tread...if not with the very high specific electronics, the blowing up, occurs in less than 100 meters range...even if all the concept is correct.