U.S. President Donald Trump has published an expletive-laden post on social media, in which he threatened to destroy Iran's power plants and bridges if it fails to meet his Tuesday deadline to reopen the Strait of Hormuz to all shipping. He repeated an earlier threat to unleash 'hell' but told U.S. media there was a 'good chance' of a deal being reached with Tehran. Iran mocked his ultimatum, dismissing it as 'helpless, nervous and stupid'. Trump's new threat came after he announced that the second crew member of a U.S. fighter jet downed over Iran had been successfully rescued in an operation deep inside hostile territory. The incident came after more than a month of war, as Iran continued to respond to U.S. and Israeli air strikes with attacks on Gulf Arab countries allied to the U.S. and Israel. Iran has also halted normal transport activity through the vital Strait of Hormuz, leading to skyrocketing global oil prices and fears of higher inflation around the world. The closure led Trump in March to announce a series of deadlines for Iran to reopen the strait, and on Sunday he reaffirmed this demand. In another comical remark, he referred to Tuesday as 'Power Plant Day and Bridge Day' for Iran, while expressing doubts about reaching a deal to resolve the conflict by extending the deadline to Thursday evening at 8 P.M. Eastern Time.