Mutually Assured Destruction..? Really.? You mean like the USA China Russia India France and the UK. Notice that none of the above has ever threatened to wipe the other off the map, by using the nuclear option. Notice that none of the above supplies weapons and training to Islamic Extremist Groups plus training, as in the case of Iran. Iran not only supplies weapons to Iraq,Afghanistan,Syria,Hezbollah Hamas and now is also training the Taliban fighting NATO and the 70.000 US Military, yes your own American Citizens in Afghanistan. So, in the event that Iran has a few nuclear warheads, they may well decide to use them. Then again, they may well use the DPRK card. Who is nuts enough to believe that people who prefer martyrdom are just satisfied on MAD. The clouds of war are gathering faster than you realize. Israel and Russia have had enough. Even China is upgrading its security on their subways. A nuclear device, plus an obscure Jihadi group, may well be used against the US. G·day.
U.S. Catholics largely open to non-traditional families, Pew survey finds (DPA)
from the article: A nuclear Iran / How far will the world go?