Gordon Corera, the BBC's security correspondent, examines how terrorists use the oxygen of publicity, how governments attempt to starve them of it, and the media response.

The Islamic State has been described as one of the most brutal terrorist organisations currently fighting in the Middle East and one with the most sophisticated (social) media strategy. Much of their expansion is not happening on the ground but online through videos, magazines and blogs they publish.

In 'Terror and the Oxygen of Publicity' Gordon Corera, the BBC Security Correspondent, examines the jihadists' social media strategy, the attempts to combat it, and how media organisations tread the fine line of giving publicity to terrorists and reporting the news.

The Producer is Anna Meisel.