Agriculture Secretary Tom Vilsack listens to a participant at the 2014 Bioproducts World Showcase and Conference in Columbus, OH on Tuesday, Oct. 7, 2014. USDA photo by Heather Hartley.
<p><a rel="nofollow" class="external text" href="https://www.flickr.com/people/41284017@N08">U.S. Department of Agriculture</a>
</p>
Heather Hartley/USDA
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/usdagov/15303223357/">20141007-OSEC-HH-0003</a>