Why Only [apparently] MI-5 and MI-6?

[Peter Lemkin]

In this matter I should add the UK is not unique. Several of the now known US intelligence and national security agencies were guarded secrets until quite recently - and a few of them are still secret both in name and in what they do! All of them keep most of their work and even defined parameters of their mandate a secret. Below are some of the known ones - others could be added - depending on definition of terms. I'm sure there are others completely in the dark......even the names unknown!


Independent agencies

• The Office of the Director of National Intelligence (ODNI)
  
• Central Intelligence Agency (CIA)
  

United States Department of Energy

• Office of Intelligence and Counterintelligence (OICI)
  

United States Department of Homeland Security

• Office of Intelligence and Analysis (I&A)
  
• Coast Guard Intelligence (CGI)
  

United States Department of State

• Bureau of Intelligence and Research (INR)
  

United States Department of the Treasury

• Office of Terrorism and Financial Intelligence (TFI)
  

United States Department of Defense

• Defense Intelligence Agency (DIA)
  
• National Security Agency (NSA)
  
• National Geospatial-Intelligence Agency (NGA)
  
• National Reconnaissance Office (NRO)
  
• Air Force Intelligence, Surveillance and Reconnaissance Agency (AFISRA), National Air and Space Intelligence Center (NASIC)
  
• United States Army Intelligence and Security Command (INSCOM), National Ground Intelligence Center (NGIC)
  
• Marine Corps Intelligence Activity (MCIA)
  
• Office of Naval Intelligence (ONI)
  

United States Department of Justice

• Federal Bureau of Investigation, National Security Branch (FBI/NSB)
  
• Drug Enforcement Administration, Office of National Security Intelligence (DEA/ONSI)