ability to achieve: “I believe that this nation should commit itself to achieving the goal, before this decade is out, of landing a man on the moon and returning him safely to the earth.” In communicating this vision, he clearly acknowledged the enormity of the goal when he said: “No single space project in this period will be more impressive to mankind, or more important for the long-range exploration of space; and none will be so difficult or expensive to accomplish.” While Kennedy’s vision may