We only have three choices. 1). Do nothing (a continuation of negotiations is the same thing) and let Iran go nuclear thus putting them in the same position as North Korea and greatly reducing our options. Iran is much more dangerous because it is run by terrorist who believes his cult (remember Islam has no separation of church and government) is destined to rule the world and subject the west to either Shira(sp?) Law or a status below our new masters. Those who think diplomacy has a chance are wrong because these savages believe it is their duty to lie and deceive infidels, all diplomacy does is buy the terrorist nation enough time to build their bomb. Kind of like what worked with Korea.
Our second choice is to "kick the can down the road" a few years by attempting the elmination of their weapons development through air strikes. This will not stop them but it should slow them down. This is not a great option as their leader is still the same terrorist savage who will then retaliate in a manner I can not forsee.
The third choice is regime change which means boots on the ground and hopefully a plan to "win the peace" this time. I believe this is the only real option that can work and assure us we will not be hit by terrorist armed with WMD, for that is Iran's goal, kill as many of us as possible and eliminate Israel.