Oleg Penkovsky

Oleg Vladimirovich Penkovsky (Russian:Олег Владимирович Пеньковский; 23 April 1919 – 16 May 1963), codenamed HERO, was a colonel with Soviet military intelligence (GRU) during the late 1950s and early 1960s who informed the United Kingdom and the United States about the Soviet emplacement of missiles in Cuba.