Iran holds the key to reopening global energy markets

When Saudi Aramco told its oil buyers in a letter this week that ​it had no clear idea which port it would use for April exports, it laid bare a new reality: Iran, not the United States, holds the key to ‌reopening the global energy market.
The letter, sent to Saudi oil buyers around the world, said they might receive oil from the Red Sea, but they might still get it from the Gulf.