How real is Iran’s threat?

Frank GardnerSecurity correspondent You might be wondering how Iran could still be in a position to threaten shipping across three seas if, as President Trump claims, the US has completely destroyed its navy. But Iran doesn’t need a conventional navy to still pose a threat to shipping. The navy of Iran's Islamic Revolution Guard Corps (IRGC), which took over the lead from Iran’s mainstream navy in the Gulf some years ago, has spent years practising for special operations. These include small, di