Tehran has shown that its grip over the strait of Hormuz is its most potent deterrent – arguably more consequential than its now defunct nuclear programme Fawaz Gerges is professor of international relations at the London School of Economics Tehran has shown that its grip over the strait of Hormuz is its most potent deterrent – arguably more consequential than its now defunct nuclear programme Fawaz Gerges is professor of international relations at the London School of Economics D onald Trump’s