I keep getting an error message and I can't figure out what I've done wrong


#1
<div class="row">
<div class="col-md-4">
 <div class="thumbnail">
  <img src="http://goo.gl/0sX3jq">
</div>
 <div class="thumbnail">
  <img src="http://goo.gl/an2HXY">
</div>

<div class="col-md-4">
 <div class="thumbnail">
  <img src="http://goo.gl/Av1pac">
</div>
 <div class="thumbnail">
  <img src="http://goo.gl/vw43v1">
</div>

<div class="col-md-4">
 <div class="thumbnail">
  <img src="http://goo.gl/0Kd7OU">
  </div>
</div>

#2

Each column should be closed before you begin the next one. Your first two columns do not have a /div tag.