What do accused ISIS supporters have in common?

Aired: 6/27/2015 | 0:03:34 | Clip
Monday marks the first full year since ISIS declared the "Caliphate" -- an Islamic State -- part of the justification for its terror campaign across the Middle East. A new study from Fordham University shows arrests in the U.S. for allegedly supporting ISIS are growing. The Director of Fordham's Center on National Security, Karen Greenberg, joins Hari Sreenivasan with more.