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During my time working in DC, I enjoyed visiting the U.S. National Archives and Records Administration our nation's record keeper.
I was very fortunate to learn early on that my USIA office was conveniently located near the archives, an Independent agency of the United States government which preserves and provides access to federal records. It is also tasked with increasing public access to those documents which make up the National Archive. It is traveling through history. https://catalog.archives.gov/