i really need some help with this i am stuck as to what to do i am stuck with this part

when I go to click save and submit code it always comes up with Oops, try again. Set the src attribute of your thumbnail image to be “http://goo.gl/0sX3jq I don’t know what I have done wrong can someone please help

<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>


 <div class="col-md-4"></div>