This case study tells the story of San Jose, California, one of the first 27 cities in the country to participate in a federal domestic preparedness program. Between 1997 and 1999, a specially created city task force mounted several full-scale terrorist attack exercises, but-despite the best of intentions-found all of them frustrating, demoralizing, and divisive, creating ill will between the exercise planners and the first responders. In response, the San Jose task force took a step back and analyzed their situation. In place of traditional full-scale exercises, San Jose drew on several existing prototypes to create a new "facilitated exercise" model that emphasized teaching over testing, and was much better received by first responders. For teaching flexibility, the case has been divided into three parts.