Major Newspapers
You can search for major news through the Power Search option in LexisNexis. You can either select US Newpapers and Wires or switch to Major World Newspapers to get an international perspective.
Be sure to limit your search to a specific time period. Otherwise, you will have thousands of results to sift through.
Even with a very focused and well designed search, you are likely to get more results than you can easily scan. The categories on the left side of the screen are especially useful in sorting the results by news source and type.