sentences:  He exposed John Vassall, a British civil servant already revealed as KGB agent by Golitsyn, eventually charged for spying in 1962, and Robert Lee Johnson, a U.S. Marine in Berlin arrested in 1964.Until his death, Nosenko lived in the US under an assumed name.17 audio files of interviews of Nosenko during the investigation of the Kennedy assassination were made public by the National Archives on July 24, 2017.