Fair enough.
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Because the marginal utility of hypersonic aircraft was not worth the marginal cost.
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Sir, that is a hard argument to refute.
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It was rocket-propelled is why.
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I love this response…



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The great stagnation, according to
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Was it not the blackbird ?
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Blackbird was second fastest. And prettier, IMHO.
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Careful not let the people know you have the alien super tech that can only be brought out to fight an existential threat (soviet union).
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We stopped doing a lot of cool stuff about 50 years ago. Hasn't it been about 44 years since the last moon landing? You're starting to make me a little teary-eyed for the Cold War.
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