them, virtually all of the clubs are racially unmixed. Bikers in American prisons, as prisoners generally do, band together along racial lines. It is claimed that racial discrimination within clubs has led to creation of rival clubs in the past, such as the Mongols Motorcycle Club after members were rejected by the local Hells Angels chapter. Some clubs or individual chapters are now multi-racial, but the number of "white supremacist biker clubs are growing nationwide". Outlaw motorcycle clubs and crime Many members of outlaw motorcycle clubs engage in criminal activities and organized crime and "pose a serious domestic threat". Law enforcement agencies perceive such individuals and motorcycle clubs as being unique among criminal groups because they maintain websites and businesses, identify themselves through patches and tattoos, write and obey constitutions and bylaws, trademark their club names and logos, and even hold publicity campaigns aimed at improving their public image. The term "outlaw motorcycle gang" was coined by the journalist Hunter S. Thompson in 1966 and was subsequently adopted by federal and local law enforcement agencies in the United States and elsewhere. Outlaw motorcycle clubs as criminal enterprises The U.S. Federal Bureau of Investigation (FBI) and Criminal Intelligence Service Canada have designated four MCs as "outlaw motorcycle gangs": the Hells Angels, the Pagans, the Outlaws, and the Bandidos, known as the "Big Four". These four have a large enough national impact to be prosecuted under the U.S. Federal Racketeer Influenced and Corrupt Organizations (RICO) statute. The California Attorney General also lists the Mongols and the Vagos as outlaw motorcycle gangs. The FBI asserts that Outlaw Motorcycle Gangs (OMGs) support themselves primarily through drug dealing, trafficking in stolen goods, and extortion, and that they fight over territory and the illegal drug trade and collect $1 billion in illegal income annually. Motorcycle gangs frequently begin mutually beneficial partnerships with independent racketeers, and build a large network of associates by doing so. Crimes are typically carried out by associates rather than "full patch" members in order to protect the club from implication by law enforcement. In 1985 a three-year, eleven-state FBI operation named Roughrider culminated in the largest OMG bust in history, with the confiscation of $2 million worth of illegal drugs, as well as an illegal arsenal of weapons, ranging from Uzi submachine guns to antitank weapons. In October 2008, the FBI announced the end of a six-month undercover operation by agents into