Tehran does not need those sunken vessels the Republican alluded to in order to control the Strait of Hormuz, Iranian political scientist Vali Nasr asserted in a recent interview with this newspaper. The fears of tanker owners — and, above all, insurers — are enough to deter many ships from attempting to cross the strait. Tehran also does not need frigates to deter those who venture into those waters. It is sufficient to use “drones, mines, and cheap weaponry,” …Or, indeed, speedboats.