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Apollo 11 astronauts planted a flag on the moon on July 20, 1969.
  • The last time a person visited the moon was in December 1972, during NASA's Apollo 17 mission.
  • Astronauts say the reasons why are budgetary and political, not scientific or technical.
  • NASA could land people on the moon again by 2026 at the earliest. Now a US lander is on the moon again.

Landing 12 people on the moon remains one of NASA's greatest achievements, if not the greatest.