Dating very intelligent service Freetexsex
The NSA is the nearest equivalent to MI5 but GCHQ's role may well overlap in terms of jurisdiction.GCHQ collaborates with all the British intelligence services on a daily basis, both cross-checking information or providing useful intelligence for the MI community. The Transportation Security Administration also is within DHS.
MI4 Aerial Reconnaisance MI5 domestic intelligence MI6 foreign intelligence MI7 Propaganda MI8 Military Communication Interception, MI9 Undercover operations, /POW escape MI10 Weapons analysis MI11 Field security police MI12 ???
"MI5/MI6" were the original designations when both organisations came under the War Office, now the MOD - "MI" stands for military intelligence.
Their official names (acquired in the 30s) are the Security Service (MI5) and SIS, the Secret Intelligence Service (MI6).
In dealing with security threats overseas we co-operate closely with the Secret Intelligence Service (SIS) and Government Communications Headquarters (GCHQ), who are responsible for gathering intelligence overseas, and with the Foreign and Commonwealth Office." Simples.
For John in London: The FBI is in fact partly an inteligence service. Intelligence Services back then,served and married my mother in England in fifties,also served in France in fifties, I was told even though he was Canadian, he also worked for the British, is it possible that he could have worked for M19 after the War 2, I am trying to validate information I have been learning on him.
Crudely, MI6 are "our" spies while MI5 is there to catch "their" spies.