1.   Apollo astronauts who explored the moon a quarter century ago found no evidence of water.

2.   Later, Europeans watched as the two superpowers spent billions competing to explore the moon, loft space stations and develop space shuttles.

3.   Their investments have helped finance a nation great enough to fight World War II, explore the moon, create the Internet and much more.

4.   They all thought that one day, their experience of exploring the moon would be shared by many others.