![](/files/01/54/39/f015439/public/00012.jpg) | early U.S., 47
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![](/files/01/54/39/f015439/public/00012.jpg) | private investment in, 262-63, 264, 265
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![](/files/01/54/39/f015439/public/00012.jpg) | Sputnik, 46-48, 104
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![](/files/01/54/39/f015439/public/00012.jpg) | Saturn 5 rocket, 2
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![](/files/01/54/39/f015439/public/00012.jpg) | problems, 185-86
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![](/files/01/54/39/f015439/public/00012.jpg) | S4B (third stage), 52-53, 55, 279
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![](/files/01/54/39/f015439/public/00012.jpg) | size, 12-13
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![](/files/01/54/39/f015439/public/00012.jpg) | test launches, 159-61, 184
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![](/files/01/54/39/f015439/public/00012.jpg) | Scheer, Julian, 196, 197, 205, 209, 238
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![](/files/01/54/39/f015439/public/00012.jpg) | Schirra, Wally, 108-10, 114-16, 193-94
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![](/files/01/54/39/f015439/public/00012.jpg) | Schmidt, Harrison ''Jack," 221
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![](/files/01/54/39/f015439/public/00012.jpg) | Schramm, Horst, 123-25
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![](/files/01/54/39/f015439/public/00012.jpg) | Scott, Dave, 113, 114
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![](/files/01/54/39/f015439/public/00012.jpg) | S.D.S. (Students for a Democratic Society), 154-56, 241, 243
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