US President Barack Obama (R) and Vice President Joe Biden arrives in the Brady Briefing Room of the White House as NBC News Chief White House Correspondent Chuck Todd does a stand-up on December 19, 2012 in Washington, DC. Obama will appoint Vice President Joe Biden to lead a panel tasked with devising new policies to address gun violence after last week's school massacre in Newtown, Connecticut. AFP PHOTO/Mandel NGAN        (Photo credit should read MANDEL NGAN/AFP/Getty Images)