"Tough questions are being asked about the role of social media in the wake of the horrific shooting that took the lives of at least 49 people at two New Zealand mosques. 'The attack on New Zealand Muslims today is a shocking and disgraceful act of terror,' said David Ibsen, executive director of the non-profit, non-partisan Counter Extremism Project (CEP) global policy organization. Tech companies are also deploying artificial intelligence and machine learning to get at the problem. But Hany Farid, a professor of digital forensics at UC Berkeley and an advisor to the CEP, thinks such systems have a long way to go. 'Despite (Mark) Zuckerberg’s promises that AI will save us, these systems are not nearly good enough to contend with the enormous volume of content uploaded every day,' he says. 'The reality, Farid adds, is that 'Facebook and others have grown to their current monstrous scale without putting guard rails in place to deal with what was predictable harm. Now they have the unbearably difficult problem of going back and trying to retrofit a system to deal with what is a spectacular array of troubling content, from child sexual abuse, terrorism, hate speech, the sale of illegal and deadly drugs, mis-information, and on and on.'”