This was the thinking behind the Strategic Defense Initiative (SDI). The concept was to figure out a way to stop nuclear missiles from hitting their target after they had been fired. How this was to be done was an enormously difficult question, for effectively it would be akin to shooting a bullet with another bullet after the trigger had been pulled. One of the hypothesized solutions would be defensive missiles fired from satellites, which earned the program the nickname “Star Wars.” Critics thought the program unworkable and derided the entire project to be an enormous waste of money. As
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