Science: Detecting the Tests

As soon as the Russians started their new series of nuclear tests in the atmosphere, it was clear that they could not have cared less how quickly the rest of the world learned about their latest tactic. Atmospheric tests are impossible to conceal; they shout their presence in varied voices, some of which carry for thousands of miles and can be detected in many ways.

>Radio receivers near the borders of the U.S.S.R. were the first U.S. instruments to report the news. Nuclear explosions in air generate sharp pulses of radio energy that can...

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