The Apollo program was the first to bring humans to the moon. Even though the program began in the early 1960s until 1972, with 12 astronauts walking the moon's surface during this time frame, there ...

Editor's note: It's been 60 years since John Glenn's mission aboard the Friendship 7 on Feb. 20, 1962. We're republishing this story on its impact, originally published in 2012, in honor of the ...