The DNA of news is changing. Breaking stories come to us on our phones and computers as well as our televisions. Social media like Twitter and Facebook have transformed the speed and manner in which our news is sourced and delivered.

In the annual Royal Television Society Lecture, BBC reporter Lyse Doucet, who has reported from Syria, Iran and Afghanistan, asks how TV journalists should harness this astonishing new resource - or does the social media revolution spell the end for broadcast news? Show less