Stop me if you've heard this before

So, Iran is lying to weapons inspectors now? Hmmm, that sounds familiar. Now, this may very well be true, this time. The problem is, it's like the boy who cried wolf, there is no way to know for sure, since this administration has no credibility. Also, the invasion of Iraq has given them incentive to develop weapons to protect themselves from a US invasion, since it's clear that we will invade if we feel like it, whether they have any weapons or not.