Saudi Arabia and Iran are in the midst of a regional power struggle. We asked the foreign ministers from the competing nations what message they would like to give to one another. (Photo: Split image of Iran's Javad Zarif and Saudi Arabia's Adel al-Jubeir. Credit: Getty Images)
Prof Mohammad Marandi says Iran has been crucial in stopping the advance of so-called Islamic State.
The Iranian Foreign Minister, Javad Zarif, has called on the United States to stop threatening Iran.
BBC Persian's Jiyar Gol reports on the arduous lives of Iranian Kurdish goods smugglers.
It comes amid rising tensions between Iran and the US.