That's where it's handy to let someone else do the work. BACM Research - PaperlessArchives.com compiles a nice selection of World War II declassified government documents, all on a handy CD.
Here's just a small list of what you can find there:
- FBI files on Adolph Hitler
- Artwork done by U.S. Navy war artists for D-Day
- Winston Churchill correspondence
- Military field manuals
- German U-Boat captured documents
Prices range from around $10 per CD, and you can also purchase complete sets at a discount. No matter which way you look at it, it's a heck of a deal, and just might save you a trip to the National Archives.