Splitting up Iraq.
As for Iraq I still think splitting it up into 3 countries would help bring stability. If I remember my history correct, the British drew the current boarders from the ruin of the Ottoman Empire.
The Kurdish country, to the north, would be able to take care of themselves and guard their boarders. They are a tough self-reliant people.
The tough part would be separating the Shiites and Sunnis. I am sure they both claim many of the same lands. But I am sure something could be worked out.
If each group had their own country, they would stop fighting each other and take more interest in building their country. And Al Qaeda would be driven out.
The only problem I see is the Iran border. Iran may see it as an opportunity to strike Iraq.