How has a year of diplomacy affected the U.S.'s international standing?

Summary: In 2013, the U.S. opted to negotiate rather than use force in Syria and Iran, but did these efforts lead to a loss of credibility? Anne-Marie Slaughter of the New America Foundation, international consultant John Negroponte, David Ignatius of The Washington Post and Trudy Rubin of The Philadelphia Inquirer join Judy Woodruff.