There are a couple of ways to find reverse links to your website.
1. Google link
That will return backlinks to cnn.com.
However, the link command only returns a small fraction of the backlinks that Google knows about, and it’s randomly picked, so Google link command isn’t that useful for reverse link lookup.
2. Yahoo linkdomain
That will show external links to cnn.com site, whether they start with www or not, and all pages with links to the site that Yahoo has found.
3. Google webmaster tool
Now you can use webmaster tools to view a much larger sample of links to pages on your site that Google found on the web. Unlike the link: command, this data is much more comprehensive and can be classified, filtered, and downloaded. Before see this information, you have to verify the ownership of your site.
You can read more details here.