TOPOFF 2000 was a single, full-scale exercise conducted over 10 days in three venues: (1) Denver, CO: Bioterrorism attack (Plague). (2) Portsmouth, NH: Chemical attack (Sulfur Mustard). (3) National Capital Region: NCR 2000, concurrent but separate exercise (Radiological Dispersal Device). Exercise TOPOFF (Top Officials) 2000 was a Congressionally mandated, no-notice national exercise held in May 2000. It was designed to assess the nation's crisis and consequence management capability by exercising the plans, policies, procedures, systems, and facilities through local, state, and Federal responses to geographically-dispersed terrorist threats and acts. The exercise was co-sponsored by the Department of Justice (DOJ) and the Federal Emergency Management Agency (FEMA), which were designated as the lead agencies for the exercise by the Senate Appropriations Committee in Senate Report 105-235. The exercise was the largest peacetime terrorism exercise ever sponsored by DOJ or FEMA. (Global Security.org. "TOPOFF 1". August 4, 2006 update)