A little off-topic, but a fact that I find amazing is that around the time of the first moon landing the average age of the mission controllers was 26.
NASA specifically wanted people right out of college to do operations so that they would not have to unlearn bad habits and since everyone would have to learn new skills for the moon landing to be successful.
http://www.pbs.org/wgbh/nova/tothemoon/kranz.html