Moderate Sunnis helping the Americans in Iraq

Link If there is some hope in Iraq it is somewhat expressed by this winning over of the moderate Sunnis to help the Americans. It's obvious these Iraqis are worried about what will happen once the Americans leave and the Shia are left alone to manage the country. Surely, the Americans will stay in some capacity, but it all depends on the political support for the war back home. It's interesting, but sensible, that the moderate Sunnis were only willing to help after they saw that the extremists were obviously losing.