Late last week, Iran dropped hints that it is ready for talks with Western powers over its nuclear program and pending sanctions. Given the mullahs’ history, many observers (Via Meadia included), have reasons to doubt their sincerity. Today’s news justifies this skepticism. This morning, Iranian deputy chief of armed forces announced that Iran would take a harder line, threatening preemptive action against any potential threats to the nuclear program: “Our strategy now is that if we feel our enemies want to endanger Iran’s national interests, and want to decide to do that, we will act without waiting for their actions.” This announcement comes on the heels of reports that IAEA inspectors had been denied access to a possible covert weapons program site near Tehran.Iran’s sudden embrace of the controversial Bush Doctrine is bad news any way you slice it, but as the Times notes, the opacity of the Iranian political process makes it difficult to assess whether the deputy chief’s comments represent the views of the mullahs or other, less important political actors.One thing is clear enough, however. Any reports of an Iranian change of heart should be taken with a grain of salt.