This exercise is designed to create an opportunity for the participants to experience a series of possible pandemic influenza environments. These scenarios are not necessarily predictive, nor do they represent the official viewpoint of any organization, group, or entity. The exercise is intended to allow the participants and their organizations to explore possible situations and to consider their options for responses and mitigation approaches. The sponsors understand that no scenario can present all aspects of a possible situation, and that there is no way to know definitively the actual circumstances that might be present during a pandemic.