In the middle of the night, electrically controlled garage doors in a number of Western states suddenly begin to open and close. At Houston's Manned Spacecraft Center, an outburst of strange signals starts disrupting communications with an orbiting Gemini spaceship. High above the Gulf of Mexico, the navigational gear of a jetliner bound for Miami mysteriously indicates that the plane is on a course for Cuba. Is a modern-day poltergeist on the loose? Not really. These baffling occurrences are, in fact, examples of a serious problem of the Electronic Age. As ever larger...
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