A group of news outlets from countries around the world have banded together to expose the alleged use of a phone hacking tool to spy on leading journalists, politicians and human rights activists. How do you pull off a series of global scoops like this? Also in the programme, the role professional fact checkers now play in journalism.Guests: Laurent Richard, Founder of Forbidden Stories, Paul Lewis, Head of Investigations at The Guardian, Claire Milne, Acting Editor of Full Fact, and Ian Birrell, Contributing Editor of The Mail on Sunday