here's one for you: I've had the opportunity to do a little work with NASA through my university, and it turns out that THEY are missing many of the important engineering documents regarding much of the Apollo program, for example. These people are amazing: they're hypersensitive to information release to the point that they are actually causing serious lapses in documentation for NASA employees looking into engineering solutions for problems we already solved. What, are the terrorists going to set up a bomb on the moon to throw off the tides and ruin my spring break? You figure a terrorist (or China) could do a lot better with a few billion than reproduce Apollo.