In the wake of the terror attack in San Bernardino, a familiar story has emerged. Two young Muslims living in the West became radicalized and began to identify with groups like ISIS. Syed Rizwan Farook and Tashfeen Malik’s journey, like many others, was in some part fueled by interactions they had on social media. Twitter, Facebook, Instagram, YouTube — the communication tools of the modern age that we’ve all come to rely on — are also the tools terror groups like ISIS use to spread their message and recruit new followers. What can we do about it?