Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF) 
The mission of ATF is to conduct criminal investigations, regulate the firearms and explosives industries, and assist other law enforcement agencies. This work is undertaken to prevent terrorism, reduce violent crime, and to protect the public in a manner that is faithful to the Constitution and the laws of the United States.
Website: http://www.atf.gov/
[ Glossary ]
