title: Linking directly to Facebook's stored og:image for a particular URL?
body: <p>It's pretty slick that Google lets you link to a website's favicon, simply like this:</p>
  
  <p><a href="http://www.google.com/s2/favicons?domain=www.stackoverflow.com" rel="nofollow">http://www.google.com/s2/favicons?domain=www.stackoverflow.com</a>.  This is great because you can use this as the src of an image.</p>
  
  <p>Anyone know of a similar way to link to the image defined in the og:image tag for a given web page -- a 3rd party URL, and not a Facebook-hosted "Page"?  This would be really handy, to do something like (and I'm making this up):</p>
  
  <pre><code>&lt;img src="https://graph.facebook.com/www.stackoverflow.com/og:image" /&gt;
  </code></pre>