In the Persian Gulf there are rumors that one of Iran’s Ghadir mini-subs sank while practicing tactics for attacking an American Nimitz class carrier. It was believed that a recently built two-thirds replica of an American Nimitz class aircraft carrier would be towed out so the Ghadir could get some experience in how to approach such a large ship and launch torpedoes at it. The rumored loss of a Ghadir was accompanied by talk of some new stealth technology on the Ghadir. That is probably just rumor as the small size of the Ghadir already confers a substantial amount of stealthiness. This purported stealth technology is supposed to explain why Iranian salvage ships are not out looking for the sunken Ghadir as that activity would tell foreigners where, approximately, the sub went down.
Stories like that — hopefully true! — keep me more-or-less sanguine most days about the prospect of an Iranian nuke.