Peshmerga fighters inspect the remains of a car bearing an image of the trademark jihadist flag, after it was targeted by an American airstrike in the village of Baqouba, north of Mosul. The car reportedly belonged to Islamic State militants Ahmad Al-Rubaye /AFP/Getty Images hide caption

itoggle caption Ahmad Al-Rubaye /AFP/Getty Images

Secretary of Defense Chuck Hagel (left) and Chairman of the Joint Chiefs of Staff Gen. Martin Dempsey during a Pentagon briefing on Thursday. Hagel said Islamic State militants in Iraq and Syria posed a threat "beyond anything we've seen." Yuri Gripas/Reuters/Landov hide caption

itoggle caption Yuri Gripas/Reuters/Landov