<a href="https://en.wikipedia.org/wiki/Robert_L._Sumwalt_(U.S._government_official)" class="extiw" title="w:Robert L. Sumwalt (U.S. government official)">Robert L. Sumwalt</a> official photo as a NTSB board member
<a href="https://en.wikipedia.org/wiki/National_Transportation_Safety_Board" class="extiw" title="w:National Transportation Safety Board">National Transportation Safety Board</a>
<a rel="nofollow" class="external free" href="https://www.ntsb.gov/news/speeches/RSumwalt/Pages/bio_sumwalt.aspx">https://www.ntsb.gov/news/speeches/RSumwalt/Pages/bio_sumwalt.aspx</a>