18-12-2017, 12:18 PM
John McCone memorandum for LBJ redacts long paragraph discussing a "very sensitive effective operation working in Mexico City... which involved telephone surveillance and was being done in a most careful manner with his knowledge and with the assistance of a few of his trusted officials."
https://www.archives.gov/files/research/...-10445.pdf
https://www.archives.gov/files/research/...-10445.pdf