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There've been rumors about electomagnetic drives of various kinds since the '40s, when apparently the Germans were working on one; and I've also seen pictures of some sort of EMG-driven craft that the Soviets were working on.
I'm better that there's something to this idea, and always has been, but nobody's been able to make it practically work. And knowing the U.S. gov, we may well have already spent millions or billions trying.
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