The Pentagon Papers, front page of the New York Times, June 13, 1971, via the ProQuest Historical Newspapers database
Tips for finding key sources of current news and historical newspapers.
News photographs showing protests at the White House, via the AP Images database.
Top, left to right: Anti-lynching (1946); Anti-nuclear tests (1958); Anti-Castro (1961)
Bottom, left to right: Anti-Vietnam War (1970); Anti-abortion (1982); Veterans chained to the fence to protest military's "Don't Ask, Don't Tell" on LGBT service members (2010)
(Click on image for larger view)