<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js"></script> <script src="//code.jquery.com/jquery-1.11.1.min.js"></script> <!------ Include the above in your HEAD tag ----------> <div class="container"> <div class="row"> <div class="col-md-12"> <img class="visible-lg img-responsive" src="http://i.imgur.com/38e8orG.jpg"> <img class="visible-md img-responsive" src="http://i.imgur.com/ujd2vvs.jpg"> <img class="visible-sm img-responsive" src="http://i.imgur.com/2G6jDIt.jpg"> <img class="visible-xs img-responsive" src="http://i.imgur.com/yYDzgWm.jpg"> </div> </div> </div>