Ok, this is slightly creepy. A few years ago, I did a little project, for fun - modeling the launch of a Saturn V into orbit in MS Excel. I got all of the info I needed for the Saturn V parameters from the Nasa Technical Reports Server. They recently shut it down in order to put "export restrictions", or something, on the information there. Today, I went looking to see if the data that I used was still available. IT IS NOT. Apparently, rocket hardware from the 1960s is now state secrets. I guess I must now be a terrorist, or enemy of the state, or something.