</div>
<div class="col-md-6 column text-center">
- <a class="thumbnail" href="http://www.facebook.com/mindcodingcluj"><img src="/img/facebook_logo.png"></a>
+ <a class="thumbnail" href="http://www.facebook.com/mindcodingcluj"><img src="/img/facebook_logo.jpg"></a>
</div>
<div class="row clearfix">