Iran is stewing over the potential loss of its most advanced centrifuge production plant after some kind of explosion and fire severely damaged it. Naturally, the Iranians are being pretty closemouthed about the incident. They haven’t said much about the fire and explosion at what was suspected to be a nuclear research facility in the mountains outside of Tehran, either. But it’s hard to hide what happened at Natanz — the nuclear facility with the highest-profile in the country. And Iran is hinting that the destruction of its advanced centrifuge plant might have been caused by some kind of variation...