For the record: The National Archives and Records Administration
(NARA) keeps up to 3% of all materials deemed important enough to
preserve during the course of conducting US federal government
business. A federal agency, NARA preserves, maintains, and provides
access to documents that record important events in US history. To
protect archives (including letters, memos, reports, and
photographs documenting citizens' rights, federal officials'
actions, and national experiences), NARA stores them in acid-free
folders and boxes in dark spaces with consistent temperature and
humidity. Some 95% of them are declassified. Created in 1934, NARA
has offices spanning some 20 states and Washington, DC.