Rather than browsing or searching news source one-by-one, try starting at tool that collects news from many outlets and let you search across that news for items that match your topic of interest.
Includes more than 15,000 news, business and legal sources. To make the search results more manageable, limit by date and to choose "News" from the Content Types menu.
Google's news aggregator. A massive collection of articles from newspapers, magazines and blogs. This is public tool, rather than something we subscribe to, so you'll sometimes encounter adds and paywalls.