The United States is now winning the war that two years ago seemed lost.

Limited, sometimes sharp fighting and periodic terrorist bombings in Iraq are likely to continue, possibly for years. But the Iraqi government and the U.S. now are able to shift focus from mainly combat to mainly building the fragile beginnings of peace — a transition that many found almost unthinkable as recently as one year ago.

Despite the occasional bursts of violence, Iraq has reached the point where the insurgents, who once controlled whole cities, no longer have the clout to threaten the viability of the central government.