Welcome to the Arson and Explosives National Repository. The National Repository was established by congressional mandate in 1996 as a national collection center for information on arson and explosives related incidents throughout the United States. The National Repository databases incorporates information from various sources such as the Bureau of Alcohol, Tobacco, Firearms and Explosives; the Federal Bureau of Investigation; and the United States Fire Administration. Information maintained by the National Repository is available for statistical analysis and investigative research by scholars and the law enforcement community.