KGB

The KGB (Komitet Gosudarstvennoi Bezopasnosti or Committee For State Security) was the intelligence service of the Soviet Union, of which Russia was a member, on Earth during the 20th century.

In Julian Bashir's Secret Agent holoprogram, the character of Anastasia Komananov was an operative of the KGB. (DS9 episode Our Man Bashir)

On 25 December 1991 the Soviet Union was dissolved, and the KGB ceased to exist. (VOY episode Future's End, Part I).