Anachronisms: In one of the early flashback news sequences, the reporter warning people to stay in their homes concludes with 'CONELRAD channel' - CONELRAD was an acronym for Control of Electromagnetic Radiation developed by the FCC during the Cold War, and was abandoned in August of 1963, replaced by the Emergency Broadcast System in the same month. Any 1970s alert would have used the EBS, not CONELRAD.
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