"Escalation of Force." Remember this expression. You will be hearing it a lot. "American soldiers were accused Friday of opening fire on a car carrying a family in the Baghdad district of Sadr City, killing a man and his two young daughters and wounding his son. The allegations were made by the man’s wife, who was in the car, and members of the Iraqi police, who were at the scene. The American military command said in a statement on Friday that it was investigating an episode in Sadr City involving “an escalation of force,” but it could not confirm any details of the account given by the man’s wife.""