APHIS [Animal and Plant Health Inspection Service] Veterinary Services (VS) and California Department of Food and Agriculture (CDFA) developed and conducted a FMD [Foot & Mouth Disease] TTX [Tabletop Exercise] exercise on June 13th & 14th to review existing response plans and electronic reporting systems with local, state, and federal partners. Approximately 100 people participated in the exercise which was held at the Stanislaus County Department of Agriculture facility in Modesto, California. The exercise 'kick-off' was via webinar on June 13th and provided an overview of the scenario (FMD-like symptoms detected simultaneously in two counties in the Central Valley) to the Players, Evaluators, and Controllers. The TTX started at 1000PDT on 14JUNE11 with an update of events that transpired overnight and the formation of a Unified Command (UC) and a Multi Agency Coordination (MAC) group. A total of seven (7) counties (Stanislaus, Merced, Madera, Kings, Fresno, Tulare, Kern) in California and one (1) county (Lyon) in Nevada were affected within 24 hours of the initial report. By the end of the exercise, approximately 100,000 head of cattle were impacted. Exercise play ended (ENDEX) at 1600PDT June 14th. A hotwash (review) for all participants was conducted immediately after the exercise.