1: In 2013 , tensions between the world powers and Iran began to thaw a bit after the election of reformist Iranian President Hassan Rouhani , who pledged to end the crippling weight of international sanctions on Iran 's economy . 2: But this interim agreement has been extended twice over a failure of the parties to meet previous deadlines for a final deal . 3: Interim deal from 2013 between six world powers and Iran has been extended twice .
1: the world powers and Iran 2: the parties 3: six world powers and Iran