The Pentagon confirmed Monday that a U.S. airstrike in Syria last month killed the Islamic State group's spokesman and chief strategist Abu Mohammad al-Adnani. Adnani is listed as the leader of ISIS' Emni group, a unit that orchestrates attacks outside of the Middle East, by the Counter Extremism Project. The U.S. State Department named him a terrorist in 2014 and later described him as "the main conduit for the dissemination of ISIL messages."