Terrorism: does it work? - The 'Hotline'

Terrorism: does it ever work? Laurie Taylor talks to Richard English, Professor of Politics at Queen's University, Belfast and author of a historical study exploring the efficacy of political violence from the Provisional IRA to Hamas. They're joined by John Bew, Professor in History and Foreign Policy at Kings College, London.
Also, the origins and development of the 'hotline' . Claudia Aradou, Reader in International Politics at Kings College, London charts the chequered history of a form of communication which arose in the context of the Cuban Missile Crisis and the Cold War.
Producer: Jayne Egerton.