U.S. Energy Secretary Wright Says Roughly 72 Ships Have Exited Strait Of Hormuz In Last 24 Hours, Amounting To 20M Barrels Of Oil; Says Return To Normal Oil Flows Delayed Due To Iranian Mines In Strait Of Hormuz; Says Iran Will Not Have Ability To Block Strait Of Hormuz Going Forward; Says Even Without Deal With Iran, U.S. Will Ensure Flows Of Oil Through Hormuz