article_snippet: Buzz Aldrin, one of the first two men to walk on the moon, used one of the world's oldest monuments to send a message about the future of space exploration.
article_snippet: Buzz Aldrin's picture is the last move in Buzz Aldrin campaign for the U.S. to focus on having human settlement on Mars.
article_snippet: Buzz Aldrin has stressed numerous times over the years that space exploration needs to continue and the U.S. needs to have a goal of settling on Mars .
article_snippet: Buzz Aldrin wrote in CNN last year: 'The moment to begin could be on the occasion of the 50th anniversary of Apollo 11's touchdown on the moon. '
article_snippet: Some 45 years ago, when Neil Armstrong and I stepped upon the surface of the moon at Tranquility Base, We fulfilled a dream held by humankind for centuries. '
article_snippet: Aldrin holds Aldrin doctorate in astronautics and has consulted for the U.S. government on the future of space exploration.
highlights_snippet: Aldrin is one of the first two men to walk on the moon in 1969 .
  