Involvement of the U.S. Marshals Service in the criminal justice system begins at the investigation and arrest stage for defendants or prisoners who escape or violate bond, probation, or parole. In the Witness Security Program, the Service provides protection for witnesses in return for testimony in critical criminal cases. The Service also provides specialized support in various emergency situations related to the courts and judicial community, provides a civilian law enforcement escort for nuclear missiles, and collects and analyzes information about potential threats to the criminal justice system. The annual report details how the Service facilitates the mission of all organizations comprising the Federal criminal justice system in such areas as fugitive investigations, prisoner processing and detention, prisoner transportation, the execution of court orders, government seizures, protection of the judiciary, witness security, and special operations. An overview of the Service's headquarters is included. Tables and figures