Are We Safe Enough? Measuring and Assessing Aviation Security explains how standard risk analytic and cost-benefit analysis can be applied to aviation security in systematic and easy-to-understand steps. The book evaluates and puts into sensible context the risks associated with air travel, the risk appetite of airlines and regulators and the notion of acceptable risk. It does so by describing the effectiveness, risk reduction and cost of each layer of aviation security, from policing and intelligence to checkpoint passenger screening to arming pilots on the flight deck.