How to <use> the <svg> element correctly for loading external sources?

I've followed many guides to adding external SVGs to a page... like this one : http://wearejh.com/design/inline-svg-use-element/

The code is like this:

<svg>
  <use xlink:href="https://upload.wikimedia.org/wikipedia/commons/5/53/Skull_and_crossbones.svg"></use>
</svg>

It just does not load, example here: http://jsbin.com/cipacitovo/edit?html,output

What am I doing wrong?