FBI’s National Security Branch

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The National Security Branch (NSB) is led by an executive assistant director and an associate executive assistant director. The NSB consists of the following entities: Counterintelligence Division (made up of one intelligence branch, two operations branches, and a counterproliferation center); the Counterterrorism Division (made up of three operations branches); the High-Value Detainee Interrogation Group (made up of an operations unit and a research unit); the Terrorist Screening Center (made up of an engagement and analysis branch, an operations branch, and the principal deputy director’s office); and the Weapons of Mass Destruction Directorate (made up of a countermeasures operations section, an intelligence analysis section, and an investigations and operations section).