Democratic debate

Saturday’s Democratic debate opened with a moment of silence for Paris (Chris Usher)

CBS News Political Director and FACE THE NATION anchor John Dickerson moderates the CBS News Democratic Presidential Debate at Drake University Des Moines, Iowa on Saturday, November 14, 2015 on the CBS Television Network. From left, Sen. Bernie Sanders, Former U.S. Secretary of State Hillary Clinton and former Maryland Governor Martin O’Malley, shown. Photo: Chris Usher/CBS ÃÂ© 2015 CBS Television Network. All Rights Reserved.