Iranian dissident filmmaker Jafar Panahi’s revenge thriller It Was Just an Accident won the Palme d’Or at the Cannes Film Festival on Saturday, handing the festival’s top prize to a director who had been banned from leaving Iran for more than 15 years. Cate Blanchett presented the award to Panahi, who three years ago was imprisoned in Iran before going on a hunger strike. The crowd rose in a thunderous standing ovation for the filmmaker.