But don't do anything other than getting scared (or "culturally enriched"), as daddy goverment will take care of all of this once you elect the right man to reactivate the old NAZI death camps.
The only reason they could have not known they were in Iranian waters would be Hallucinationalism of the type which makes 'Muricans think all the world's oceans' are their yankee lake. Meanwhile, the new sanctions are burning any bridges the US probably has left with Iran.