Nahum Eitingon
Nahum Isaakovich Eitingon (Russian: Наум Исаакович Эйтингон, romanized: Naum Isaakovich Eytingon), also known as Leonid Aleksandrovich Eitingon (Russian: Леонид Александрович Эйтингон; 6 December 1899 – 3 May 1981), was a Soviet intelligence officer who gained prominence through his involvement in several NKVD operations, including the assassination of Leon Trotsky, the orchestration of partisan movements during World War II, and atomic espionage. He has been described by Yevgeny Kiselyov as one of the organisers and managers of the system of state terrorism under Joseph Stalin and later a victim thereof.