KGB

Is the successor organisation to the OGPU, the successor to the Cheka. Their star man was Vladimir Putin who made it from lieutenant colonel to president of Russia. He is now [ 2010 ] the prime minister and the best ruler they have had since Peter the Great.

Cheka
Was the secret police set up by Felix Dzerzhinsky and a very nasty outfit. Then came the:-

OGPU
Followed by:-

NKVD
Then the:-

KGB
Which departed leaving us with the:-
Federal Security Service

Vasili Mitrokhin
Their chief archivist betrayed them because he was disgusted by their track record of evil.