MI5 (Military Intelligence 5) is one of two branches of the British Secret Intelligence Service. It deals with counterinsurgency and intelligence on internal security threats. The other branch, MI6, deals with intelligence-gathering overseas.
MI5 (Military Intelligence 5) is one of two branches of the British Secret Intelligence Service. It deals with counterinsurgency and intelligence on internal security threats. The other branch, MI6, deals with intelligence-gathering overseas.