In this June 23, 2014, photo, mourners chant slogans against the al-Qaida breakaway group Islamic State of Iraq and the Levant after they bury 15 bodies in the village of Taza Khormato near the northern oil-rich city of Kirkuk, Iraq. U.S. teams of special forces going into Iraq after a three-year gap will face an aggressive insurgency, a splintering military and a precarious political situation as they help Iraqi security forces improve their ability to battle Sunni militants. (AP Photo/Emad Matti)