<link href="//netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//netdna.bootstrapcdn.com/bootstrap/3.0.0/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"> <p> <a class="btn" data-toggle="collapse" href="#collapseExample" aria-expanded="false" aria-controls="collapseExample"> <img src="http://stg2.partnershipagainstcancer.ca/wp-content/uploads/2017/07/Graham_Sher-cropped.jpg" class="bios-image wp-post-image" alt="Graham Sher"> </a> <button class="btn btn-primary" type="button" data-toggle="collapse" data-target="#collapseExample" aria-expanded="false" aria-controls="collapseExample"> Button with data-target </button> </p> <div class="collapse" id="collapseExample"> <div class="card card-block"> Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. </div> </div> </div> </div>

a.img{ max-width:100%; height:40px; }