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  Launch of Sputnik IThe launch of Sputnik I spurred the US to launch its
 own satellites and begin space exploration in earnest. It
 also marked the beginning of the competition between
 the US and the USSR to have dominance in space.
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  President Kennedy challenges nation to reach the moon before the end of the decadePresident Kennedy's challenge was important because
 it set a lofty goal for the U.S. space program and paved
 the way for legislation that would provide funding for
 the space program.