Federal Bureau of Narcotics
The Federal Bureau of Narcotics (FBN) was an agency of the United States Department of the Treasury, with the enumerated powers of pursuing crimes related to the possession, distribution, and trafficking of listed narcotics including cannabis, opium, cocaine, and their derivatives. Headquartered in Washington, D.C., the FBN carried out operations and missions around the world.
Source: Wikipedia — Federal Bureau of Narcotics (CC BY-SA 4.0)