Abstract: A method and system for assisting in the prediction, detection, deterrence, prevention and mitigation of potential terrorist attacks. In one embodiment, various scenarios are designed to simulate possible terrorist attacks or other crises. These scenarios are presented to a decision maker operating, for example, under an organizational policy. The scenarios may be presented, for example, in an immersion environment in multimedia format, and the responses of the decision maker are evaluated. The results are then used, for example, to evaluate the effectiveness of the policy, or to evaluate the decision maker for training purposes. The results are also used, for example, in an analogous events library, which a decision maker refers to in an actual crisis.