Not only are corporations and other organizations sometimes targeted by competitors in order to steal their information, they are also targets of political and/or religious groups who understand their economic and symbolic importance. However, a realistic security strategy requires a big-picture approach. At the same time, budgets are decreasing while security departments are dealing with threats that demand greater vigilance. In the wake of the 2008-2009 global economic melt-down, corporate executives are asking difficult questions about effectiveness and efficiency. The need for both information security and physical security is greater today than ever before, and not only to address more complex and dangerous crisis situations, but also to ensure that the methods deployed are indeed proportionate to risk. The notion of risk is the lens from which all such problems must be viewed. This book identifies and explains these foundational principles, and shows how they directly relate to an assessment of physical security risk. This book provides the modern security professional with a useful reference that facilitates both rigorous thinking and sensible decisions about key strategic choices. 500,000 security professionals need to manage the risks that face their organizations in the 21st century. It covers topics needed by homeland security professionals as well as IT and physical security managers. It follows an integrated approach to assessing security risk offers vital safeguards for business continuity.