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Folder, "NSAM # 315: Communications Security Survey [includes information on physical and telecommunications security at the White House and the LBJ Ranch], 10/29/1964 [1 of 2]," National Security Action Memorandums, NSF, Box 5 (Item)
  • >enetration techniques such as intra-red windowpane pickott, laser beams, lip reading by telescope, directional . ·- :parabolic microphones, etc., appear to be limited by phY°sical. conditions at the White House and the state Of the art. HoWever, advanced