Legal Definitions - Bureau of Alcohol, Tobacco, Firearms, and Explosives

The Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF) is a unit within the U.S. Department of Homeland Security. Its main responsibility is to enforce laws related to firearms, explosives, and the production, taxation, and distribution of alcohol and tobacco products.

For example, the ATF investigates cases of illegal gun trafficking, regulates the sale and distribution of alcohol and tobacco products, and ensures that businesses comply with federal laws related to these products.

The ATF was formerly known as the Bureau of Alcohol, Tobacco, and Firearms and was part of the Department of the Treasury. However, its law-enforcement functions were transferred to the Department of Homeland Security in 2002.