Smoke rises from buildings in the northern Iraqi city of Kirkuk following a car bomb attack on October 2, 2013. Violence has reached a level unseen since 2008, and there are fears Iraq is slipping back toward the intense Sunni-Shiite bloodshed that peaked in 2006-2007 and killed tens of thousands. AFP PHOTO / MARWAN IBRAHIM (Photo credit should read MARWAN IBRAHIM/AFP/Getty Images)