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>In 1945, there were literally a total of a few hundred phone lines fully crossing the United States.

Seems amazing now, but it was only 30 years before in 1915 when Graham Bell in NYC talked to Watson in San Francisco. That was thanks to the wire finally existing and tube amplification finally showing up. (So hard to find good, close-up details on that 30 years.) 1945 when Arthur C. Clarke proposed a 3-satellite system. 1963 when Relay 1 and geosynchronous Syncom 2 showed up.

'Microwave towers' ... for those who haven't seen them, this article goes into what's left of them - with pix. [https://99percentinvisible.org/article/vintage-skynet-atts-a...]

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