On July 20, exactly 42 years from the historic moment when Neil Armstrong and Buzz Aldrin became the first humans to step upon the lunar surface, NASA made history again by releasing a set of guidelines for protecting the sites visited by the two astronauts and those who would follow. “NASA’s Recommendations to Space-Faring Entities: How to Protect and Preserve the Historic and Scientific Value of U.S. Government Lunar Artifacts” is a critical step in recognizing and preserving the historical significance of the Apollo missions.