Yahoo Global News Anchor Katie Couric is joined by a panel of experts to break down Senator Joni Ernst's Republican response to President Barack Obama's sixth State of the Union Address. Guests include Yahoo News' Chief White House Correspondent Olivier Knox, Political Columnist Matt Bai and Chief Investigative Correspondent Mike Isikoff. Additional guests include Susan Crawford, Director of the Berkman Center for Internet & Society at Harvard University, and independent journalist Janell Ross.