The ISIS terror threat

In this image taken from a hilltop in Mursitpinar, Turkey, Kurdish fighters walk to positions as they combat ISIS forces in Kobani, Syria, on Sunday, October 19. Civil war has destabilized Syria and created an opening for the militant group, which also is advancing in Iraq as it seeks to create an Islamic caliphate in the region.

In this image taken from a hilltop in Mursitpinar, Turkey, Kurdish fighters walk to positions as they combat ISIS forces in Kobani, Syria, on Sunday, October 19. Civil war has destabilized Syria and created an opening for the militant group, which also is advancing in Iraq as it seeks to create an Islamic caliphate in the region.