If they are made in Iran, there is a factory. Bomb the sh*t out of it. If we do not have the will to do it, then ask the Israelis to do it for us.
This has been an ongoing issue. Confederate Yankee covered this story already in July. That is long enough to address this issue diplomatically, and this was reportedly discussed when the US met with Iran, only to be met with denials.
And if we are going to go to the trouble of leveling the missile factory, then we might as well also destroy the factory that is manufacturing the powerful EFPs being used as IEDs coming out of Iran. (PDF Report here.)This act will have two immediate effects. One, reduce the flow of these weapons to terrorists as well as send a message to Iran that the US is prepared to act (in addition to sanctions) and that there is still a price to pay for attacking US forces.
So while Congress fights over how to restrict the President's options when it comes to stopping Iran, (reckless behavior in my opinion) it should be taken into account that those actions have the side effect of protecting the manufacture and supply of these weapons. The problem is not that these facilities cannot be targeted; it is a lack of will to use force to do so. The Iranians know this and are taking advantage of it. Do keep in mind that this would not be an attack, but more so a response to being attacked already.
Iranian Rockets Recovered In Iraq [with Photos] - Confederate Yankee
More Iranian Rockets Used to Attack U.S. - Jawa Report