Saudi Arabia

The price of oil has plummeted as a glut of crude sits idle in tankers and in storage. And more oil could be on the way if a nuclear deal removes the caps on Iranian oil exports.

The self-proclaimed Islamic State has recruited more than 2,000 young Saudi men. Some have already come back to carry out attacks on Saudi soil. The kingdom is preparing to confront the threat.

Prince Turki al-Faisal, the ex-Saudi intelligence chief, says the "pinprick" attacks against the Islamic State are not proving effective. He also says the campaign needs to be better coordinated.