ISIS has emerged from all other violent extremist groups as the most organized, successful, and terrifying terrorist outfit in the world today. Their territorial victories, slick digital presence, and rapid development of state-like functions is leaving the best political and military minds in the U.S. at a loss, and driving fears of attacks on American soil. At the root of this fear is the phenomenon of foreign fighters joining ISIS ranks, in light of the group’s success at recruiting young Muslim men from the West. It is estimated that roughly 100 Americans have joined ISIS, along with many more Muslims from Europe. The question that then follows is what will happen if these fighters return home?