Yes, it's where you can find their documents released through FOIA requests. A lot of them have been scanned originals and photostat copies, so there are quite a few that are illegible. Many are also heavily redacted. It's interesting to see (in the posted Hitler doc) on some of the handwritten letters to the FBI how patriotic people were in wishing J Edgar the best and general congratulations to the FBI. It's kind of sad that they are no longer teaching cursive handwriting in some public schools- in a few generations only specialists will be able to read many of the documents.