Come July 20 2009, it would be exactly 40 years since man set foot on the moon.
On the 25th May 1961 President John F Kennedy told Congress: "I believe that this nation should commit itself, before this decade is out, to the goal of landing a man on the Moon and returning him safely to Earth." --- A lot can be learnt from this!!!
Had NASA not been put under pressure to meet Kennedy's deadline, they would have chosen a far different approach to land a man on the Moon than the one used. It was originally hoped to do it stage by stage using a permanent Earth orbiting station that would make future flights a lot easier, but instead had to settle for a 'one time' system to meet the deadline. With the new system going from launch pad, to orbit, to the Moon and back, using disposable components, it was possible to achieve within the time frame, but it meant each mission was a 'one off' and contributed nothing towards the overall mission plan that could be used by following Moon flights.
"Journey Of A Million Miles Begins With Single Step"