The Federal Bureau of Investigation is an organ of the United States Government.[1] The Bureau was founded on July 26, 1908. It falls under the responsibility of the United States Attorney General. The Bureau is one of the sixteen agencies described as composing the United States Intelligence Community.
The FBI has the primary responsibility for domestic counterintelligence and counterterrorism -- like the United Kingdom's MI-5.[1] In addition the FBI is responsible for investigating a wide selection of federal crimes and investigating "organized crime".
In most cases, the FBI's jurisdiction is over interstate matters, where incidents span one or more states and neither state can claim local jurisdiction.