Photo of Feb. 21, 2017, SEPTA rear-end collision in Upper Darby, Pennsylvania. (Photo: Upper Darby Police Department.)
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/68618467@N03">National Transportation Safety Board</a>
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/ntsb/36943837955/">SEPTA rear-end collision in Upper Darby, PA</a>