Sputnik crisis
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Project Vanguard
Glenn L. Martin Company
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List of military operations
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Army Ballistic Missile Agency
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Sergei Korolev
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Vanguard TV-3
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Vanguard 1
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Moon landing conspiracy theories
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International Geophysical Year
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Spaceflight
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Explorer 1
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Sputnik 1
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Satellite
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Jet Propulsion Laboratory
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February 17
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Explorers Program
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December 6
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Ben Bova
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Vanguard program
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