Iran

Would it be the end of the world if they had the bomb? I got ramped up a couple months ago by an article about how Iran's quest for the bomb was different from nearly all other countries, because it is not a part of an arms race. Because of this fact, it is speculated that the Iranians motives are at best, blackmail, and at worst, to use it against Israel or give to a terrorist group, if they feel threatened.

This article points a pretty bad picture, in that we are fairly stuck with how to deal with them. What about regime change?