Let's Stop Going in Circles - And Go Somewhere (2002).
"Between the time I was 2 and when I turned 14 humanity went from zero spaceflight capability to putting humans on the Moon. To me, my first vision of spaceflight was one where quantum leaps were to be expected. I knew this because I saw these leaps happening before my own eyes. That expectation took a firm hold of me and hasn't left me - or many of my generation. Yet we, and the generation that has followed us, have been cheated of what could have been done in space.
In the following three decades we have yet to send humans back to the Moon. Indeed, it would probably take us longer to recreate the ability to "land humans on the Moon and return them safely to the Earth" than it did to do so the first time. As for sending humans to Mars - it was 20 years or so away when I was a kid. Thirty years later it is still that far off - if not further.
As for the ISS, we could have built this - and should have built this - a decade ago. Now ...