The events of 9/11 and subsequent acts of jihadist terrorism, together with the failures of intelligence agencies over Iraq's Weapons of Mass Destruction, have arguably heralded a new age of intelligence. For some this takes the form of a crisis of legitimacy. For others the threat of cataclysmic terrorism involving chemical, biological, radiological or nuclear attack gives added poignancy to the academic contention that intelligence failure is inevitable. Many of the challenges facing intelligence appear to be both new and deeply worrying. In response, intelligence has clearly taken on new...