“I believe that this nation should commit itself,” stated a boyish President John F. Kennedy before a packed-to-the-rafters joint session of Congress in 1961, “to achieving the goal, before this decade is out, of landing a man on the Moon and returning him safely to the Earth. 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.”