I have a News category that is only displayed on pages for logged-in users. 
This information should NOT be visible to unauthenticated users.  But if an
unauthenticated user does a search, the search results may include the
"protected" News articles.

Not sure what would be the best way to handle this.  It almost seems like it
would have to be handled on a per-article basis (article can be searched
yes/no), but perhaps there is a better way.  And this wouldn't be perfect
either, because my logged-in users (who have access to the page that calls the
News category) SHOULD be able search and find this article.

Thanks!