This volume examines the success of the 9/11 attacks in undermining the cherished principles of Western democracy, free speech and tolerance, which were central to US values. It is argued that this has led to the USA fighting disastrous wars in Afghanistan and Iraq, and to sanctioning the use of torture and imprisonment without trial in Guantánamo Bay, extraordinary rendition, surveillance and drone attacks. At home, it has resulted in restrictions of civil liberties and the growth of an ill-affordable military and security apparatus. In this collection the authors note the irony that the shocking destruction of the World Trade Center on 9/11 should become the justification for the relentless expansion of security agencies. Yet, this is a salutary illustration of how the security agencies in the USA have adopted faulty preconceptions, which have become too embedded within the institution to be abandoned without loss of credibility and prestige.