"Gevork Vartanian, a former Soviet intelligence agent who helped derail a Nazi plot to assassinate allied leaders at a 1943 conference in Tehran, has died. He was 87. "Vartanian died Tuesday of an unspecified illness, according to Russia's Foreign Intelligence Service, a top KGB successor agency. "President Dmitry Medvedev sent condolences to Vartanian's widow, Goar, who worked together with him on intelligence missions abroad and helped cement their fame as a legendary Russian spy couple." Gevork Vartanian obituary: Soviet spy who helped derail plot to kill Allied leaders, dies at 87 - latimes.com