Technicians set up and test electronic equipment in United States. Electronic equipment on table. The technician tests the equipment. He connects its wire to other equipment and switches it on. He again checks and switches it on.
A hand turns dial on a small transistor radio in United States. The radio transistor placed on a table. The radio is tuned to Conelrad frequency.
U.S. Air Force technician setting up electrical equipment for an experiment. He inserts metal tube into a cylinder within a ring of metal. The equipment is wired from both the sides. He rotates the assembly for easy viewing.
A device for generating pulses of intense light is placed on a table. Other equipment in the background. A small projection screen is placed in front of the equipment. It reflects the pulses of light generated by the electrical device.
A model of earth in United States. Yellow points are spotted on the model.
SAC Primary Alerting System in United States. A map with yellow and red points. They are joined together to show the alerting system.
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