Product Review

On 7 July 2005, explosions on three underground trains and one bus in London killed 56 people. The victims represented the diversity of Britain's most cosmopolitan city. It is believed that the attackers killed themselves in carrying out this act. If so, this is Britain's first suicide bombing. David Rosenberg explores the history and politics behind such terror attacks and finds out about people who organise and carry them out. (Channel Four)