Since 9/11 there has been a heightened awareness of the need to apply emergency management and business continuity techniques to essential national infrastructure and commerce. Russell King's book is about exercises that he has written and moderated over 10 years. It answers questions about the true value of exercising for disasters for senior managers and places the discipline of exercising within a wider systems planning context. Contents include exercises on responses to natural disasters, a pandemic, a wide-area sporting event of world attention, as well as hints and inspiration for a wider range of exercises on supply chains, general business capacity, and receiving dignitaries in the aftermath of challenging events. The aim is to give a realistic but economic method of exercising with minimum of time and avoid disrupting the organisation. Useful for beginners and advanced practitioners, this account of his work has been prepared in collaboration with the History of Wargaming project.