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Walking through scenarios is an effective technique for discovering requirements, but scenarios can differ widely in their abstraction levels and representation forms. Some requirements analysts use scenarios that describe a system's external visible behavior. Others use live sequence charts to model a system's dynamic behavior. Requirements analysts also use scenarios for everything from explaining a current system to walking through a future system's behavior to discover its requirements. However, determining the right form of scenarios for different requirements tasks remains an open question -one we're investigating with ART-SCENE. ART-SCENE is an Internet-based environment for generating and walking through text scenarios. The ART-SCENE tool supports rich media scenarios in requirement discovery. These scenarios help stakeholders recognize events that a system will have to handle.