Documents / FOIA release
This is National Intelligence Estimate 11-5-61, Soviet Technical Capabilities in Guided Missiles and Space Vehicles. It was submitted by the Director of Central Intelligence and concurred in by the United States Intelligence Board on 25 April 1961. The estimate assesses Soviet surface-to-air, antimissile, air-to-air, air-to-surface, ballistic, ICBM, naval and space programs. It concludes that the first Soviet ICBM unit was probably operational around 1 January 1960. It also says there is no evidence the Soviets are developing offensive space weapons. It contains no UFO material.
“Gray”1 page
000278407 -S-ECRET BEST COPY AVAILABLE Figure 25 ESTIMATED CHARACTERISTICS U. S. Designation SHYSTER -SS-3 IOC Dote 1956 Maximum Range 700 N.M. Propulsion Liquid, probably LOX/kerosine Configuration Single Stage Guidance Radio/menial Accuracy 1 N.M. Maximum Warhead Weight 3,000 Pounds Ground Environment Rood Mobile 55-3 SURFACE-TO-SURFACE MISSILE (SHYSTER) SECRET
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FOIA release, from the cia-readingroom collection. The PDF is mirrored here; the original link is above. 101 pages are in the text index: search them above, or from the library's search.