A U.S. soldier takes position near Haifa street in Baghdad, June 23, 2006. The U.S. military has launched a criminal investigation into whether U.S. soldiers killed a family of four Iraqi civilians in their home south of Baghdad, officials said on Friday. Here you seen the soldier in a tense standoff with a poster suspected of having strong ties to the insurgency. (Namir Noor-Eldeen/Reuters)