Four trends have been reshaping simulation support for human-in-the-loop experimentation at the Joint Innovation and Experimentation Directorate of Joint Forces Command. The first is the need to interoperate with nonmilitary partners such as civilian agencies and emergency responders. The second is the rapidly expanding role of the World Wide Web as the communications medium of choice. The web opens new channels for the simulation to stimulate. Third, the domain of interest for military leaders and planners is expanding from traditional armed conflict to include many aspects of civilian affairs both in war and in peace. Finally, there is the continuous pressure for greater efficiency in all endeavors. While these trends have been long standing, their combined effects crystallized for us when we were asked to support the Noble Resolve series of experiments. Unlike previous experiments, the participants included the Department of Homeland Security and state emergency management personnel. The common operating picture was not presented on GCCS and the protocols were not LINK or OTH-Gold. Instead, web based common operational picture tools such the Department of Homeland Security's Integrated Common Analytical Viewer and websites were the participant's interface to the experiment. The domain was not combat but earthquakes, evacuation, and rescue; and we needed to execute with a minimum of operator support. These factors led us to reconsider the balance between stimulation and simulation; when to use one over the other and how to deliver stimulation content. In the process we have developed a more flexible and efficient approach for combining simulation and stimulation and delivering stimuli via a variety of Internet channels.