From left to right, Apollo 11 astronaut Buzz Aldrin, Amazon.com and Blue Origins founder Jeff Bezos, Apollo 17 astronaut Harrison Jack Schmitt, and Apollo 11 astronaut Michael Collins listen as Apollo 7 astronaut Walt Cunningham speaks during the commemoration for the upcoming anniversary of the 1969 mission to the moon and a gala for Aldrin's non-profit space education foundation, ShareSpace Foundation, at the Kennedy Space Center in Cape Canaveral, Fla., on Saturday, July 15, 2017. (AP Photo/Alex Sanz)
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