UN suspends polio drive in Pakistan after killings - Article Photos 8/10

Pakistani polio workers chant slogans during a demonstration against the killing of their colleagues, 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 five female polio workers. The placard on right reads, "why is the government silent over the killings of innocent people?"(AP Photo/Anjum Naveed)