The strategic challenges of humanitarian operations and crisis/disaster management (HOCM) have increased many folds in the current era because of increased scale and frequency of all types of disasters - natural, man made and industrial accidents. Three of the most devastating natural disasters (the Asian tsunami, the Haiti earthquake, and the Japanese earthquake) registered in the last 100 years took place during the last decade. There is an increasing awareness among researchers that an individual crisis/ disaster is not an independent event. Rather, crisis management often involves the study of causal chains (for example, the 2011 earthquake in Japan).
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