This is what General Petraeus calls success:

A few nights ago, for example, we witnessed the death of one American soldier and the critical wounding of two others when a lethal armor-piercing explosive was detonated between an Iraqi Army checkpoint and a police one. Local Iraqis readily testified to American investigators that Iraqi police and Army officers escorted the triggermen and helped plant the bomb. These civilians highlighted their own predicament: had they informed the Americans of the bomb before the incident, the Iraqi Army, the police or the local Shiite militia would have killed their families.

As many grunts will tell you, this is a near-routine event. Reports that a majority of Iraqi Army commanders are now reliable partners can be considered only misleading rhetoric.