Possessing these documents without authorization would violate the national security laws of two nations: Canada (where it was built) and the United States (who footed the bill).
Build a Hovercraft With Your Kids — When Jamie Hyneman and MeFi's Own™ Adam Savage built hovercrafts for Mythbusters, he realized that these floating-on-air vehicles were easy to make, not too expensive, and fun. So he built one with his kids. More diy hovercraft fun.
How to build a bomb isn't all there is to the Internet as press would have you think. Anyway it's harder than just getting some plans, as this guy found out. So why not build a bomb shelter instead? Or build your own train, hovercraft, speedboat, car or plane - can't fly - don't worry build a flight simulator! Toast your success with DIY firewater cooked with your solar furnace. Enjoy your CB radio, listen to MP3s or toy with your sextant. And with all the kinky clothes and loads of pervy toys to make who has time to build bombs? I can see the bumper stickers now "Make leg spreaders, not war!"