If you find yourself needing an important FBI document from, say, 1909, you actually might be in luck. The FBI is now making available scads of public documents, over 2,000 to be more exact, via a site called The Vault, pursuant to the Freedom of Information Act. All that paper has been scanned and added and you can search the site by name or browse by categories, such as:
Administrative Policy Procedures
Gangs Extremist Groups
Political Figure Events
World War II
Get a list of docs by title and summary within each category. I find myself wondering as I write, though, what could possibly be considered a hot topic when you have dedicated categories for gangster era stuff and unexplained phenomena. But seriously, what a fantastic resource for students seeking information to support a research project.
Hat tip to MakeUseOf.