In his detailed monograph Espionage and Counterintelligence in Occupied Persia (Iran), Anglo-Canadian intelligence historian Adrian O'Sullivan has thoroughly reviewed the primary sources and secondary literature on Operation Long Jump and has placed the alleged plot squarely in the context of Allied security operations around the time of the Tehran Conference. O'Sullivan claims to have debunked the perpetuation of the myth in recent years by the KGB and the Putin-era intelligence services.[16]