Lyndon Johnson’s CIA and FBI briefings left him with two unpalatable interpretations of Mexico City. According to the CIA, Oswald was part of a Cuban-Soviet assassination plot that was revealed by the audio-visual materials garnered by its surveillance techniques. According to Hoover, Oswald had been impersonated in Mexico City, as shown by a more critical examination of the same CIA materials. Hoover left it to Johnson to draw his own conclusions as to who was responsible for that impersonation.
