National Security Branch

Overview
The National Security Branch (NSB) consists of the FBI’s Counterterrorism Division (CTD), Counterintelligence Division (CD), Directorate of Intelligence (DI), and the new Weapons of Mass Destruction Directorate (WMDD) and combines the missions, capabilities, and resources of each.

The NSB oversees the national security operations of these four components and is also accountable for the national security functions carried out by other FBI divisions.