U.S. Agriculture Secretary &lt;a gi-track='captionPersonalityLinkClicked' href=/galleries/search?phrase=Tom+Vilsack&amp;family=editorial&amp;specificpeople=681029 ng-click='$event.stopPropagation()'&gt;Tom Vilsack&lt;/a&gt;, Deputy Director of USDA's Center for Nutrition Policy and Promotion Robert Post, Secretary of Health and Human Services &lt;a gi-track='captionPersonalityLinkClicked' href=/galleries/search?phrase=Kathleen+Sebelius&amp;family=editorial&amp;specificpeople=700528 ng-click='$event.stopPropagation()'&gt;Kathleen Sebelius&lt;/a&gt; listen during a news conference to announce the release of the 2010 Dietary Guidelines for Americans at George Washington University January 31, 2011 in Washington, DC. The USDA held the news conference to promote proper nutritional guidance and '...reduce the risk of chronic diseases, and reduce the prevalence of overweight and obesity through improved nutrition and physical activity,' according to a USDA news release.