This week we’re celebrating the 50th anniversary of the Apollo moon landing. Everyone who walked on the moon first trained in Flagstaff. We’re hearing stories from the people who worked to make it happen. NASA estimates it took more than four hundred thousand people to get Neil Armstrong and Buzz Aldrin to the surface of the moon. Baerbel and Ivo Lucchitta were two of them. A husband-and-wife team in Flagstaff, Ivo taught geology to astronauts at places like Sunset Crater and Meteor Crater, while Baerbel made detailed maps of the moon. As young scientists they’d studied the geology of Earth, but were swept up into the Space Age after hearing the unmistakable sound of Sputnik, the first satellite in space.