Nancy A. Youssef, Pentagon Won’t Say How Many Troops Are Fighting ISIS, The Daily Beast, 2 febbraio 2016. URL consultato il 15 maggio 2016.
«"Officially, there are now 3,650 U.S. troops in Iraq, there primarily to help train the Iraqi national army. But in reality, there are already about 4,450 U.S. troops in Iraq, plus another nearly 7,000 contractors supporting the American government’s operations."»