The number of civilians killed in Iraq decreased for the third straight year. By Dec. 25, 3,976 civilians died, compared to 4,680 the year before. According to Iraq Body Count, a U.K.-based group, two-thirds of civilian deaths in 2010 were caused by bombings carried out by sectarian and terrorist groups. So far, over 100,000 Iraqi civilians have been killed in the conflict. Just this week, Iraq's Prime Minister Nouri al-Maliki announced that all U.S. troops would leave the country by the end of 2011.