U.S. Vice President <a gi-track='captionPersonalityLinkClicked' href=/galleries/search?phrase=Joseph+Biden&family=editorial&specificpeople=206897 ng-click='$event.stopPropagation()'>Joseph Biden</a> listens as he is introduced during the 81st Winter Meeting of the U.S. Conference of Mayors (USCM) at Capital Hilton Hotel January 17, 2013 in Washington, DC. Biden delivered remarks on gun control during the opening plenary luncheon of the meeting.