title: Font awesome icons not working with bootstrap
body: <p>I added the CDN to my code:</p>
  
  <pre><code>&lt;link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css"&gt;
  </code></pre>
  
  <p>But when I try to add a button with a font-awesome icon, it shows a blank space:</p>
  
  <pre><code> &lt;div class="container"&gt;
      &lt;a class="btn" href="#"&gt;
         &lt;i class="fa fa-twitter"&gt;&lt;/i&gt;
      &lt;/a&gt;
   &lt;/div&gt;
  </code></pre>