Of unverified origin, there was also a great little vignette I heard about how American intelligence discovered that the Soviets were not doing their own research on the dispersion and aftereffects of nuclear blasts, they were just using the available data from the USA. Problem was, that data was being massively understated, for political and propaganda reasons. The worry was that the Soviets might think that a nuclear war was far more survivable than it really was....making first strike more of a realistic possibility. US intelligence had to figure out a way to leak the real numbers, without it being obvious that it was a leak, which would have made the Soviets dismiss those numbers as false intel.
".... I have always found that plans are useless, but planning is indispensable." - Dwight D Eisenhower