A Pakistani female polio worker administers polio drops to an infant in Christian colony situated in the slums of Islamabad, Pakistan on Wednesday, Dec. 19, 2012 in Islamabad, Pakistan. Gunmen shot ... more 
A Pakistani female polio worker administers polio drops to an infant in Christian colony situated in the slums of Islamabad, Pakistan on Wednesday, Dec. 19, 2012 in Islamabad, Pakistan. Gunmen shot dead a woman working on U.N.-backed polio vaccination efforts and her driver in northwestern Pakistan, officials said, just a day after similar attacks across the country killed several female polio workers. (AP Photo/B.K. Bangash) less 
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Associated Press | Photo By B.K. Bangash
Wed, Dec 19, 2012 10:16 AM EST