IF teamwork and a sense of shared responsibility were crucial factors in the U.S. effort to land men on the moon, so were the contributions made by a number of individuals. By providing the answers to such questions as how to build a big enough booster, what flight plan to follow, and how to guide the spacecraft, these men eliminated obstacles that might have delayed the program indefinitely. Among the men:

¶ Dr. John C. Houbolt, 50, former chief of theoretical mechanics at NASA's Langley Research Laboratories in Hampton, Va. Houbolt, a civil engineer,...

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