Primary sources are the raw materials of scholarship. What counts as a primary source often differs by discipline, however. In the field of history, primary sources are anything created during the time period under consideration: published books; unpublished letters; photographs or drawings; music or song lyrics; clothing; objects of everyday life; etc. In the field of religious studies, primary sources can be anything from sacred texts to rituals, with lots in between.
Academic libraries and historical museums often try to digitize primary source collections held in their archives and special collections in order to make them available to the widest possible audience.
Advocacy websites are themselves rich collections of primary source material. You can use the structure of the entire site as a primary source, or select particular elements within it to analyze. A few examples are listed below:
To start, try searching these Library of Congress subject headings in Primo, then use the facets on the right of the results page to explore different types of materials.
Guantánamo Bay Detention Camp.
Prisoners of war -- Cuba -- Guantánamo Bay Naval Base
The Internet Archive runs the Wayback Machine, which is an archive of over 660 billion snapshots of websites over time. If the URL to a primary source in your reading no longer works, try plugging it in to the WayBack Machine!
The following full-text newspaper databases will let you access local, national, and international news sources.