Earlier today I posted an excerpt from an Israeli web site that specializes in defense matters. The site raised the specter of a nuclear bomb dropped into the Mediterranean by Iran generating a tsunami that could wipe out Tel Aviv. I said that I didn't know if this were even possible and now I find out that it's not, or at least there's good reason to think that it's not.
A piece at Real Clear Defense explains why not. The short version is, "There is just no explosive powerful enough — atomic or otherwise — that can displace the amount of water required to create waves powerful enough to destroy cities."
For which we can all be grateful. Now we can just worry about Iran affixing their nukes to missiles and delivering them the old-fashioned way.