ERTISEMENT
Donilon, who served as national security adviser between 2010 and 2013, said U.S. forces are „going to have to become deeply involved“ in helping Iraqi security forces retake Mosul, the second largest city in Iraq.

He also said he thinks U.S. forces will become „fairly deeply involved“ in retaking Raqqa, ISIS‘s declared capital in Syria.

The U.S. will also have to look at direct military action in Libya, as well, to address a growing ISIS presence there, he added.