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1. electric energy
Michael Collins in the Columbia
2. cotton gin
Thomas Edison
3. warns about approaching storms
Neil Armstrong and Edwin Aldrin
4. warns about missiles sent up anywhere
capable of destruction
5. instant communication
conservation
6. walked on the moon
Tiros I
7. orbited the moon
Midas II
8. protecting natural resources
Telstar
9. atomic power
Eli Whitney
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