The Library of Congress's website, Chronicling America has a search engine that will identify United States newspapers that were available in a particular place and time.
A complete list of newspapers is available at Google News Archive. That list is arranged by title of the newspaper and provides access to a browsable list of all issues available.
In order to search the newspapers in Google News Archive, do a search in a Google search box that includes the term(s) for which you wish to search and include the phrase "site:news.google.com/newspapers" (without the quotation marks) in the search box. For example, to search for articles about Pearl Harbor, do the search:
site:news.google.com/newspapers "pearl harbor"
The databases listed below are part of the FAU Libraries collection and to access them will require you to log in using our FAU Net ID.
Florida Atlantic University Libraries
777 Glades Road
Boca Raton, FL 33431