In December 2019, The Washington Post won a three-year court battle to release 611 documents, representing more than 2,000 pages, about the lengthy war in Afghanistan.  The documents show the American government's effort to deceive the public about the war, adding more evidence to what I convey to my students: governments, even democratic ones, can and do lie to their citizens.

CREST–25-year Program Archive -- https://www.cia.gov/library/readingroom/collection/crest-25-year-program-archive

This is a massive trove of documents that the CIA released in early 2017 (13 million pages as of January 2017).  It includes any declassified materials that are at least 25 years old. The documents were available earlier, but researchers had to travel to the National Archives in College Park, MD.  A law suit by Muckrock, under the Freedom of Information Act, forced the CIA to place the records on line.  See https://www.muckrock.com/news/archives/2016/dec/14/lawsuit-cia-crest/.

Soviet Policy toward Eastern Europe under Gorbachev: National Intelligence Estimate (May 1988): https://www.cia.gov/library/center-for-the-study-of-intelligence/csi-publications/books-and-monographs/at-cold-wars-end-us-intelligence-on-the-soviet-union-and-eastern-europe-1989-1991/16526pdffiles/NIE1112-9-88.pdf

President's Daily Briefs (PDB) for the administrations of Richard M. Nixon and Gerald R. Ford, Jr., 1969-1977:

Portal -- https://www.cia.gov/library/readingroom/presidents-daily-brief (click on “view all PDB documents)

Announcement -- https://www.cia.gov/library/publications/intelligence-history/presidents-daily-brief-nixon-ford/index.html

Archival Collection -- https://www.artic.edu/archival-collections/explore-the-collection

Artworks from the museum's collection in digital form -- https://www.artic.edu/collection

An article about the digital art collection is at https://kottke.org/18/11/the-art-institute-of-chicago-has-put-50000-high-res-images-from-their-collection-online

The Library of Congress and Yale University have created a website that allows viewers to see photographs from the Great Depression in the United States along with pinpointing their location.  For an explanation of the project, see http://www.theatlantic.com/business/archive/2014/08/seeing-the-great-depression/379238/.

Revelations from the Russian Archives -- http://www.loc.gov/exhibits/archives/intro.html -- This site contains translated documents from Soviet history from 1917 to 1991.

Anatoly S. Chernyaev (head of the International Department, Central Committee of the CPSU), 1975 -- http://nsarchive.gwu.edu/NSAEBB/NSAEBB516-Anatoly-Chernyaev-Diary-1975-Uncertainty-Detente-Brezhnev/

"NATO Expansion: What Gorbachev Heard" -- https://nsarchive.gwu.edu/briefing-book/russia-programs/2017-12-12/nato-expansion-what-gorbachev-heard-western-leaders-early

“NATO Expansion: What Yeltsin Heard” -- https://nsarchive.gwu.edu/briefing-book/russia-programs/2018-03-16/nato-expansion-what-yeltsin-heard

Messages and Responses (communication from the Department of State’s Dissent Channel–background at https://nsarchive.gwu.edu/briefing-book/foia/2018-03-15/department-states-dissent-channel-revealed) -- https://nsarchive2.gwu.edu//dc.html?doc=4412301-20160433DOS127-Nsa

"The Soviet Invasion of Afghanistan, 1979" -- https://nsarchive.gwu.edu/briefing-book/afghanistan-russia-programs/2019-01-29/soviet-invasion-afghanistan-1979-not-trumps-terrorists-nor-zbigs-warm-water-ports.

Contained in these eight volumes (in 12 books) is the evidence the American and British prosecutors used while preparing for the Nuremberg Trials.