You cannot deter a person whose ideology includes martyrdom. Tehran is a state sponsor of terrorism. Many of these terrorists are quite willing to blow themselves up in order to kill. To be killed in what they believe is the will of Divinity. We constantly hear from Iran the retort to prove that they sponsor terrorism. The danger is a direct attack from Tehran. The danger is a nuclear attack by proxy; by Iranian sponsored terrorism. The only way that there is any chance at all of MAD working as deterrence is if terrorism is eliminated. Since the world does not seem to have the stomach to do the job militarily then Iran must be prevented from acquiring the bomb. By rejecting the offer to replace the heavy water reactor with a light water reactor is the clearest indication there is that Iran does not intend for the development of nuclear technology for strictly peaceful purposes. I pray that Russia does not make the same mistakes that it made prior to WWII.
Magnitude 6.1 quake hits Panama-Colombia border (Reuters)
from the article: Let them have nukes