Outlaw Motorcycle Gangs (OMGs) are organizations whose members use their motorcycle clubs as conduits for criminal enterprises. OMGs are highly structured criminal organizations whose members engage in criminal activities such as violent crime, weapons trafficking, and drug trafficking. There are more than 300 active OMGs within the United States, ranging in size from single chapters with five or six members to hundreds of chapters with thousands of members worldwide. The Hells Angels, Mongols, Bandidos, Outlaws, and Sons of Silence pose a serious national domestic threat and conduct the majority of criminal activity linked to OMGs, especially activity relating to drug-trafficking and, more specifically, to cross-border drug smuggling. Because of their transnational scope, these OMGs are able to coordinate drug smuggling operations in partnership with major international drug-trafficking organizations (DTOs).