Responsive Navigation Bar built on top of Bootstrap

navbarSample.html

<header class='navbar navbar-default navbar-static-top'>
  <nav class='container' role='navigation'>
    <div class='navbar-header'>
      <a href='index.html' class='navbar-brand'>Blasting Off With Bootstrap</a>

      <button type='button' class='navbar-toggle collapsed' data-toggle='collapse' data-target='.navbar-collapse'>
        <span class='sr-only'>Toggle navigation</span>
        <span class='icon-bar'></span>
        <span class='icon-bar'></span>
        <span class='icon-bar'></span>
      </button>
    </div>

    <ul class='nav navbar-nav navbar-right collapse navbar-collapse'>
      <li><a href='#'>Tickets</a></li>
      <li><a href='#'>Stations</a></li>
      <li class='dropdown'>
        <a href='/about' data-target='#' class='dropdown-toggle' data-toggle='dropdown'>About <span class='caret'></span></a>
        <ul class='dropdown-menu' role='menu'>
          <li><a href='#'>Our Story</a></li>
          <li><a href='#'>Contact Us</a></li>
          <li class='divider'></li>
          <li><a href='#'>Blog</a></li>
          <li class='divider'></li>
          <li><a href='#'>Twitter</a></li>
          <li><a href='#'>Facebook</a></li>
        </ul>
      </li>
    </ul>
  </nav>
</header>