Social media has become an important part of our lives, galvanising protesters and driving elections.
Some of the world's biggest social media companies want to battle against what they consider "terrorist propaganda" online.
Facebook, Twitter, YouTube and Microsoft want to create a database of "digital fingerprints", which will flag content that is considered offensive or violent.
That includes recruitment videos for armed groups or gruesome imagery.
Once one bit of content is removed by one company, others can quickly follow suit, the companies hope.
But should these companies be in the business of censoring content?
Presenter: Sohail Rahman
Guests:
Robert Pape - Director of the Chicago Project on Security and Terrorism at the University of Chicago and co-author of Cutting the Fuse: The Explosion of Global Suicide Terrorism and How to Stop It
Aral Balkan - Digital rights activist
Jamil Jaffer - Former associate counsel to President George W Bush and Director of the Homeland and National Security Law Programme at George Mason University
