For example, Heinz Höhne, a famous historian and specialist on the history of the Third Reich (as well as writing a complete biography of Wilhelm Canaris, chief of the Abwehr), wrote in an article in "Der Spiegel" that no such German plot ever existed, but Rezun notes that Höhne omits from the article the fact that Canaris had visited Tehran on the eve of the German attack on the Soviet Union.