Secret Satellite: Building the Corona Satellite
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On Discovery Channel's "Secret Satellite," learn about the Corona satellite, which was a spy satellite built to orbit the Earth by Lockheed Martin. Once in orbit, the satellite would turn on and off... (more info)

On Discovery Channel's "Secret Satellite," learn about the Corona satellite, which was a spy satellite built to orbit the Earth by Lockheed Martin. Once in orbit, the satellite would turn on and off its camera each time it passed over enemy territory.

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