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Apollo 11's astronauts had six months to gel as a crew and prepare for humanity's greatest space feat. The three had never served together on the same spaceflight before, and the busy preparation left little if any time for bonding.
Hundreds of millions tuned in to radios or watched the grainy black-and-white images on TV as Apollo 11's Neil Armstrong and Buzz Aldrin set foot on the moon on July 20, 1969, in one of humanity's most glorious technological achievements.
We can only wonder what innovations from the effort to send people to other planets will affect earthlings 50 years after the first Marswalk.
By Jean Creighton, University of Wisconsin-Milwaukee