TIME magazine editor explains Hillary Clinton's "smart power"

Whether it's the rise of the Arab Spring in the Middle East or the killing of major Al-Qaeda figures – it's been a year of major changes on foreign shores. Staying on top of these sweeping changes has kept Secretary of State Hilary Clinton plenty busy. Clinton has been working aggressively behind the scenes to oversee the transition to democracy in the Middle East. At the same time, it's been a challenge to work within an administration headed by a former political rival.

Carol Costello speaks with Massimo Calabresi, who wrote this week's TIME Magazine new cover story on Clinton, to discuss the Secretary of Ctate's use of "smart power" – and her surprising obsession with social media.