While researching Larry Lessig's new book Free Culture, I came across a reference to http://www.archive.org, a site dedicated to archiving everything. This afternoon I downloaded a copy of the now famously ridiculous "Duck and Cover" film from the 50's. It taught kids that the best thing to do in case of a nuclear attack was to duck and cover. There is a myriad of material there waiting to be analyzed in a historical context, or perfect for remixing into multimedia products.