Neil Armstrong faced his greatest challenge after returning from the Moon. His 1969 lunar landing was risky, but all of his NASA training couldn't prepare the Ohio native for the intense media spotlight that followed. Everyone wanted to shake the hand of the first person to set foot on the Moon. It was too much, and the humble hero retreated into academia. Armstrong died in 2012 at 82. This revealing Dec. 3, 2014, episode of the PBS series "Nova" shows how he spent the second half of his life unable to top that one small step.
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