reinafter Source D. “Guy Burgess, Donald Maclean and Kim Philby, See “The Spy Cases,” Appendix A of this book. Intention of staying in Russia...”-- Snowden NBC Interview. Op cit. Bamford, Wired. Op. cit. Jane Mayer “Snowden Calls Russian-Spy Story “Absurd” in Exclusive Interview,” New Yorker, January 21, 20