The National Security Bureau (NSB) is a top United States security agency. Also referred to as The National Security Board. The mission of the NSB grants the agency special privileges and jurisdiction over other government agencies when the situation demands. It is unknown to which branch of the government the NSB is accountable.
NSB and OSI
The official relationship between the NSB and the OSI is unknown. When OSI agents have been suspected of criminal activity, the NSB has become involved. In these situations, the mission of the NSB takes precedence over the mission of the OSI and the authority of its director.