sentences:  CIA operations officer George Kisevalter, well regarded for his prior handling of Major Pyotr Popov, the first Soviet GRU officer run by the CIA, and a native Russian speaker, was detailed to assist Bagley.In 2013 Bagley wrote another book, revealing new details he acquired by comparing notes with Soviet KGB Chief Sergey Kondrashev.Bagley says he had always suspected that Nosenko might be a plant and was glad to have this confirmed by Kondrashev.