Iran hopes to bring an additional 1 million barrels of oil per day back online in the coming months if a deal can be signed, a volume that would crush oil prices.
A Saudi-led coalition is trying to stop Yemen's major cities falling to Houthi Shiite insurgents after the removal of President Hadi, who has fled into exile. Rivalry with Shiite Iran lies behind the military intervention.
The international war in Yemen comes after a surge in the recruitment of children by armed groups and the military. An end to the conflict must focus on renewing the UN's efforts to protect Yemen's teenagers from being pressed into battle.