I found a site that has amassed a large number of government documents through the Freedom of Information Act.
There are lots of interesting official government papers here covering a wide range of subjects. Many of the topics might be useful for sci-fi or modern games as a source of ideas and odd peeks into history.
From Subterrenes to MKUltra and from constructing a military base on the moon to Project Orion, its a fascinating place to dig into. The science and military files, especially. Fringe and controversies might be adventure seeds...http://www.theblackvault.com/documentarchive/