Biography: Reaching for the moon
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Buzz Aldrin
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Kathryn Thornton
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Neil A. Armstrong
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John Glenn
A
Correct answer
Explanation
Neil Armstrong was the first human to walk on the moon during Apollo 11 in 1969. While Buzz Aldrin was the second, Armstrong's first steps are the most iconic achievement, making him the subject of a book titled 'Reaching for the Moon'. Kathryn Thornton and John Glenn were also astronauts but not the first on the moon.