"Electronic Jihad" : The Internet as Al-Qaeda's Catalyst for Global Terror / Martin Rudner -- The Call to Jihad : Charismatic Preachers and the Internet / Angela Gendron -- Why Do Terrorists Migrate to Social Media? / Gabriel Weimann -- Westgate : A Case Study : How al Shabaab used Twitter during an ongoing attack / David Mair -- Violent Extremism Online and the Criminal Trial / Keiran Hardy -- Brothers, Believers, Brave Mujahideen : Focussing attention on the audience of violent jihadist preachers / Anne Aly -- Determining the Role of the Internet in Violent Extremism and Terrorism : Six Suggestions for Progressing Research / Maura Conway -- Grasping at Thin Air : Countering Terrorist Narratives Online / Sarah Logan -- Narratives and Counter-Narratives of Islamist Extremism / Halim Rane.