Mark Barden, the father of a victim at Sandy Hook Elementary School, is embraced by Vice President Joe Biden while joining U.S. President &lt;a gi-track='captionPersonalityLinkClicked' href=/galleries/search?phrase=Barack+Obama&amp;family=editorial&amp;specificpeople=203260 ng-click='$event.stopPropagation()'&gt;Barack Obama&lt;/a&gt; in making a statement on gun violence in the Rose Garden of the White House on April 17, 2013 in Washington, DC. Earlier today the Senate defeated a bi-partisan measure to expand background checks for gun sales. Also pictured (L) is former Rep. Gabby Giffords.