On July 21, 1969, when the Apollo 11 crew was due to depart the lunar surface after a 22-hour visit, two speeches were placed on President Richard Nixon’s desk. “Fate has ordained that the men who went to the moon to explore in peace will stay on the moon to rest in peace,” read the contingency speech. Would Buzz Aldrin and Neil Armstrong live out the rest of their days staring at the blue glow of Earth from 250,000 miles away?