In this three-part series, Peter Taylor investigates the terrorist threat from young Muslim extremists radicalised on the internet. Although they represent a tiny minority of the Muslim community, some would argue they now constitute the single biggest threat to the UK's national security. Investigating the origins of Generation Jihad, Taylor looks at the radicalisation process and unravels the history, from Rushdie to Afghanistan, that has set Generation Jihad on its path. Yorkshire - home to many thriving Muslim communities - is also home to three of the bombers who attacked London on the 7 July 2005. In Dewsbury, West Yorkshire, he investigates the case of Hammaad Munshi - how did a bright, well-educated 15-year-old end up becoming Britain's youngest convicted terrorist?