IE 11 is not supported. For an optimal experience visit our site on another browser.

A look at the tough, long fight targeting ISIS

12:37

Steve Kornacki talks with NBC’s Foreign Correspondent Ayman Mohyeldin and State Dept. Deputy Spokesperson Marie Harf about the growing coalition against ISIS, whether the U.S. could be unintentionally helping Assad with Syrian airstrikes, the threat of homegrown “radicalization,” the threat of the Khorasan group, and much more.