I heard the story, saying that after the tests of ballistic missiles, our real wreck was buried near the target, and the fake was digged in the distance. The Americans from the satellites saw a hole far from the target and thought that the Soviet missiles were inaccurate - and the sweat did not take measures to protect many of their objects.
When they once saw how on the picture bulldozers buried a hole near the target and dug a new one nearby, they were in shock. It turned out that they were very vulnerable for about 10 years.