“Apollo 20 was taken off the schedule five months after Neil Armstrong and Buzz Aldrin had ‘won’ the Moon race. Apollo 18 and 19 were cancelled soon afterward, as budget cuts, and changing political priorities, impacted NASA. When Schmitt, Cernan and Evans prepared for a dramatic nighttime launch on December 7, 1972, they knew that it would be a good few years before anyone followed them to the Moon, but they never imagined that another half a century would pass, and still no one would have built upon their achievements” (Bizony, p.169).