sentences:  Nosenko also stated that the KGB had never questioned Oswald about information he might have gained as a U.S. Marine, including work as an aviation electronics operator at Naval Air Facility Atsugi in Japan.The CIA's Soviet Union division suspected that Nosenko was a KGB plant.One reason was that although he finally admitted that he was only a captain instead of a lieutenant colonel (claiming he had exaggerated his rank to make himself attractive to the CIA), the official KGB documents he had initially provided were examined by the CIA and proved that Nosenko was indeed a lieutenant colonel.