A girl receives a polio vaccination in Sanaa December 17, 2013, during a national campaign to vaccinate more than 4.7 million children across Yemen against polio. REUTERS/Khaled Abdullah (YEMEN - ... more 
A girl receives a polio vaccination in Sanaa December 17, 2013, during a national campaign to vaccinate more than 4.7 million children across Yemen against polio. REUTERS/Khaled Abdullah (YEMEN - Tags: HEALTH) less 
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Reuters | Photo By Khaled Abdullah / REUTERS
Tue, Dec 17, 2013 7:44 AM EST