Kidnapped Nigerian schoolgirls spotlights human trafficking

      |The international outcry to "bring back our girls" is putting new focus on protecting young women from terrorists and human traffickers. Sister Rosemary Nyirumbe and New York Times columnist and co-author of "Half the Sky: Turning Oppression into Opportunity for Women Worldwide" Nicholas Kristof discuss the situation in Nigeria with the "CBS This Morning" co-hosts.