Here is some info on the type of bombs Iran may be trying to have :
http://www.jpost.com/IranianThreat/News/Article.aspx?id=244919
Not seeing how Israel can afford out and out war with Iran because they worry that Iran might try nukes of that capability on Tel Aviv.
But where there are little alligators, big ones can’t be far away. Even though my father worked on/with nukes, I know very little about them, but I’m thinking if Iran can build a small nuke, they can build a big one. It may be harder to deliver than a small one, but I would say, something from 50 megaton up would do more than ruin a neighborhood? Maybe someone here can weigh in on that.