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.
Aeropnet trunk paths shown on a model of earth in United States. Yellow points on the model. They are joined together to show the paths.