Iran plowing ahead toward nuclear weapons
As time goes by, and it becomes painfully obvious that the United Nations can't do jack to stop them, Iran has gotten cockier about this. Right now it's pretty much rubbing the U.N.'s nose in its own utter impotence.
Even if somebody gets the nerve to take out their nuclear capacity by military force, I'm not sure it's centralized enough to accomplish it.
But the ayatollahs and their Islamist allies cannot be allowed to have access to nuclear weapons.