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A member of the Kurdish forces stands next to an armored vehicle on December 18. The vehicle was destroyed by an improvised explosive device placed by ISIS militants that killed several Peshmerga fighters and injured dozens late Wednesday, as the Kurdish forces pushed towards Sinjar Mountain.
A member of the Kurdish forces stands next to an armored vehicle on December 18. The vehicle was destroyed by an improvised explosive device placed by ISIS militants that killed several Peshmerga fighters and injured dozens late Wednesday, as the Kurdish forces pushed towards Sinjar Mountain.

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2014 'unprecedented' in world crises

As Valerie Amos, the top UN humanitarian official, prepares to step down, she speaks with CNN's Christiane Amanpour.

2014 'unprecedented' in world crises

As Valerie Amos, the top UN humanitarian official, prepares to step down, she speaks with CNN's Christiane Amanpour.