Sergei Tretyakov (intelligence officer)
Colonel Sergei Olegovich Tretyakov (Russian: Сергей Олегович Третьяков; 5 October 1956 – 13 June 2010) was a Russian SVR (foreign intelligence) officer, who defected to the United States in October 2000.
Colonel Sergei Olegovich Tretyakov (Russian: Сергей Олегович Третьяков; 5 October 1956 – 13 June 2010) was a Russian SVR (foreign intelligence) officer, who defected to the United States in October 2000.