Juan Cole thinks we may be at a key juncture in the battle for Baghdad
"In the capital, the US military and Iraqi soldiers of the elected government launched a big security operation. Some 3500 US troops had been brought down from Mosul (where security promptly collapsed, according to al-Zaman).
"It turns out that the Sunni Arab guerrilla strategy had been gradually to ethnically cleanse southern districts of the capital [Ar.], so as to cut it off from the Shiite south. One observer in Baghdad told a friend of mine that this operation is make or break. If the US cannot stop the deterioration of security in Baghdad at this point, then the capital is lost, and with it the country."