◆ SpookStack

74. (Continued) i -AUP-SECRET 709 21 Oct 62 B. Second, the establishment this fall of a major Soviet base in Cuba for strategic attack on the US, III. What we know about what the Soviets are actually doing in Cuba is based on hard intelligence from many sources: A. Repeated aerial photography of Cuba, which has been compared with a mass of aerial photography of the USSR; B. Photography of Soviet ships en route to Cuba from low-altitude aircraft and by surface ob- servers in various locations; Cc. A firm knowledge, developed from many sources over the years, of Soviet military doctrine and practice; D. Interrogation in detail of the 1,500-2,000 refugees a week coming into Florida from Cuba; E. Agent operations. IV. The first indication that the USSR had taken a decision on Cuba came in late July. A. At that time, 4 Soviet passenger ships after a voyage under secrecy conditions arrived at the western Cuban naval base, Mariel. As of 20 October, fifteen such unpublicized passenger voyages have been counted. -~-2- FoP-Sacnee