“War trends as foreseen by General H. H. Arnold include: One, airplanes traveling at supersonic speeds; at such speeds, aerial combat as it is known today would be impossible. Two, development of guided missiles; reﬁnement of their controls could enable exact hits on targets of a mile square or less, at any part of the world from any part of the world. Three, great developments in defense against aircraft and guided missiles; every new weapon of offense brings forth a weapon of defense, and this should remain true even in the case of the atomic bomb.”
—Scientific American, November 1945
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