<link href="//netdna.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//netdna.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<div class='container'>
<h1>No Gutter Grid <small>with CSS attribute selectors</small></h1>
<p>Best viewed: <a href="http://bootsnipp.com/iframe/eNjV6" target="_blank">full screen</a>
</p>
<h3>Normal Grid</h3>
<div class='row'>
<div class='col-sm-3'>
<img class='img-responsive' src='//lorempixel.com/400/150/nature/1/' alt="">
</div>
<div class='col-sm-3'>
<img class='img-responsive' src='//lorempixel.com/400/150/nature/2/' alt="">
</div>
<div class='col-sm-3'>
<img class='img-responsive' src='//lorempixel.com/400/150/nature/3/' alt="">
</div>
<div class='col-sm-3'>
<img class='img-responsive' src='//lorempixel.com/400/150/nature/4/' alt="">
</div>
</div>
<h3>No Gutter Grid</h3>
<div class='row row-no-gutter'>
<div class='col-sm-3'>
<img class='img-responsive' src='//lorempixel.com/400/150/nature/1/' alt="">
</div>
<div class='col-sm-3'>
<img class='img-responsive' src='//lorempixel.com/400/150/nature/2/' alt="">
</div>
<div class='col-sm-3'>
<img class='img-responsive' src='//lorempixel.com/400/150/nature/3/' alt="">