In April 1954 a Soviet-trained assassin revealed to the Central Intelligence Agency that he had been dispatched to Frankfurt on a mission to shoot the émigré Ukrainian nationalist leader George Okolovich with cyanide-tipped bullets fired from an ingeniously constructed gun concealed inside a pack of cigarettes. Khokhlov’s defection proved an embarrassment for the Kremlin, and Khokhlov himself was later the victim of an unsuccessful attempt to kill him when he ingested radioactive thallium in Switzerland.