early warning systems

__SPACER__ The first early warning systems were large concrete dishes which focused the sound of incoming Zeppelins towards listeners wearing stethoscopes, during WW1. Today’s nuclear attack early warning systems are largely satellite based infra red detectors and airborne dishes, mounted on planes and helicopters. They have made a vast array of geodesic domed, Cold War radar installations obsolete, where they remain abandoned in some of the most isolated places on earth such as Greenland and Northern Canada.

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